Oppo A5x VS Realme C73 5G

In terms of physical design, the Oppo A5x and Realme C73 5G are strikingly similar. Both share identical dimensions — 165.7 mm tall and 76.2 mm wide — meaning they occupy the same footprint in hand and pocket. The weight difference is negligible: the A5x comes in at 193 g versus the C73 5G's 197 g, a 4-gram gap that no user will perceive in daily use.

Where a small but measurable difference emerges is in thickness and IP rating. The Realme C73 5G is marginally slimmer at 7.94 mm compared to the A5x's 8 mm, which translates to a very slightly lower volume — though again, this is imperceptible in practice. More meaningfully, the Oppo A5x holds an IP65 rating versus the Realme's IP64. Both protect against dust ingress and water splashes, but IP65 adds protection against low-pressure water jets, while IP64 only covers water splashes from any direction. In real-world terms, the A5x can better handle accidental exposure to running water, such as rain or a rinsed sink.

Overall, the two phones are essentially twins in design, but the Oppo A5x has a clear edge due to its superior IP65 water resistance rating. For users who prioritize durability against water exposure, this is a genuine differentiator despite how closely matched everything else is.

Both phones feature an identical LCD IPS panel at 6.67 inches with the same 720 x 1604 px resolution and 264 ppi pixel density. At this size, 264 ppi delivers adequately sharp visuals for everyday use — text is readable and images are reasonably crisp — though it falls short of the sharper Full HD panels found on more premium devices.

The single meaningful differentiator here is the refresh rate. The Realme C73 5G steps up to a 120Hz panel versus the Oppo A5x's 90Hz. In practice, 120Hz produces noticeably smoother scrolling, more fluid animations, and a more responsive feel during casual gaming. The jump from 90Hz to 120Hz is subtler than going from 60Hz to 90Hz, but it is still perceptible to most users in side-by-side use. On the other side of the coin, the Oppo A5x includes branded damage-resistant glass, which the C73 5G lacks — meaning the A5x screen is more likely to withstand minor drops and scratches over time.

This group presents a genuine trade-off rather than a clear overall winner. The Realme C73 5G has the edge in display smoothness thanks to its higher refresh rate, making it the better choice for users who prioritize fluid interaction. However, the Oppo A5x counters with better screen durability through its damage-resistant glass, which matters more for users prone to drops. Neither phone wins outright — the right choice depends on whether the user values smoothness or longevity more.

The chipset divide here is substantial. The Oppo A5x runs on the Qualcomm Snapdragon 6 Gen 1, built on a modern 4 nm process, while the Realme C73 5G relies on the MediaTek Dimensity 6300 at 6 nm. The smaller node in the A5x translates directly to better power efficiency and thermal management — meaning it can sustain performance longer under load without throttling as aggressively. The Geekbench 6 scores confirm this gap: the A5x leads with 943 single-core and 2748 multi-core versus the C73 5G's 782 and 2012 respectively. That is roughly a 20% single-core and 37% multi-core advantage, differences that are noticeable in app launch speeds, multitasking responsiveness, and sustained workloads.

RAM is another area where the A5x pulls decisively ahead. It ships with 8GB of DDR5 RAM at 2750 MHz, compared to the C73 5G's 4GB of DDR4 at 2133 MHz. The doubled RAM capacity means the A5x can keep significantly more apps active in the background without reloading, and the faster DDR5 standard further improves memory throughput — backed by a 22 GB/s peak bandwidth versus the C73 5G's 17.07 GB/s. For users who switch between multiple apps, stream content, or occasionally game, this difference is felt in day-to-day fluidity.

The Oppo A5x holds a clear and comprehensive performance advantage in this category. Faster chipset, more efficient process node, double the RAM, faster memory — there is no metric here where the C73 5G leads on raw performance. The C73 5G's slightly higher GPU clock speed at 950 MHz versus 800 MHz is the one technical footnote in its favor, but given the A5x's more capable GPU architecture overall, this does not reverse the conclusion.

On the rear camera, these two phones are effectively identical — both offer a single 32 MP main shooter with a CMOS sensor, phase-detection autofocus, and identical 1080p at 30fps video recording. The full feature set — HDR mode, slow motion, panorama, manual exposure and ISO, continuous autofocus during video — is mirrored exactly across both devices. Users can expect comparable rear camera output from either phone.

The front camera is where the comparison diverges. The Realme C73 5G jumps to a 32 MP selfie camera, a significant leap over the Oppo A5x's 5 MP front shooter. In practical terms, this means the C73 5G captures far more detail in selfies and video calls, preserving facial texture and producing sharper images in good light. Compounding this, the C73 5G's front lens also has a wider aperture of f/1.8 versus the A5x's f/2.2, meaning it admits more light — an advantage that becomes particularly relevant in dimmer indoor or evening conditions.

For anyone who regularly uses the front camera, the Realme C73 5G has a commanding edge in this category. The combination of six times the megapixel count and a brighter aperture makes it a meaningfully stronger selfie device. The rear cameras are a wash, so users who shoot primarily with the main camera will find the two phones evenly matched — but for selfie-focused users, the C73 5G is the clear pick.

Rarely does a spec group produce a result this conclusive: the Oppo A5x and Realme C73 5G are in a perfect dead heat on software. Both ship with Android 15 and share an identical feature set across every single data point provided — from privacy controls like location and camera/microphone permissions, to usability features like split-screen, picture-in-picture, dynamic theming, and offline voice recognition.

The practical implication is that users of either device will have the same baseline software experience. Key quality-of-life features — battery health check, extra dim mode, on-device machine learning, customizable notifications, and full-page screenshots — are present on both. Neither phone receives direct OS updates, which is also equally relevant as a shared limitation rather than a differentiator.

This category is an absolute tie. There is not a single software feature in the provided data that one phone offers and the other does not. Prospective buyers should place zero weight on operating system when choosing between these two devices, and look to other categories — performance, cameras, or design — to inform their decision.

A shared 6000 mAh battery capacity means neither phone has an inherent advantage in terms of how long a single charge lasts — both sit well above the typical 5000 mAh found in most mid-range devices, which translates to genuinely strong endurance for heavy users. Where the two devices diverge is in how quickly and conveniently that battery gets replenished.

The Oppo A5x supports 45W fast charging, which at that wattage can realistically refill a 6000 mAh cell from near-empty to a usable level in well under an hour. The Realme C73 5G, by contrast, is capped at 15W — three times slower. For users who top up their phone during a lunch break or before heading out, this gap is genuinely consequential. That said, the C73 5G counters with a feature the A5x entirely lacks: wireless charging. The convenience of simply placing the phone on a pad — particularly useful on a desk or nightstand — is something a segment of users values highly, even if the charging speed itself is modest.

Declaring a winner here depends on usage habits. For users who need rapid wired top-ups, the Oppo A5x is the stronger choice by a significant margin. But for those who prefer the effortless convenience of wireless charging and are less concerned about charge times, the Realme C73 5G offers a feature the A5x simply cannot match. On balance, the A5x's 45W advantage is the more broadly useful capability, giving it a slight practical edge for most users.

Neither phone includes a 3.5mm headphone jack, so wired audio on both is limited to the USB-C port — a shared constraint that pushes users toward Bluetooth or USB-C headphones. Beyond that common ground, however, the two devices diverge noticeably in audio output quality.

The Oppo A5x brings two meaningful advantages: stereo speakers and support for aptX Bluetooth audio codec. Stereo speakers produce a wider, more immersive soundstage for media consumption — watching videos or listening to music without headphones is a noticeably more engaging experience compared to a single mono driver. The aptX codec support, meanwhile, enables higher-quality wireless audio transmission to compatible Bluetooth headphones, reducing compression artifacts and improving clarity over standard SBC encoding. The Realme C73 5G offers neither — it has a mono speaker setup and no enhanced Bluetooth audio codec support.

The Oppo A5x has a clear edge in audio. Whether listening through speakers or Bluetooth headphones, it delivers a richer experience in both scenarios. For users who regularly consume media, stream music, or invest in quality wireless headphones, the A5x's stereo output and aptX support make it the meaningfully stronger choice in this category.

The most consequential difference in this category is cellular connectivity. The Realme C73 5G supports 5G, while the Oppo A5x is limited to 4G LTE. For users in areas with 5G coverage, this means access to significantly faster mobile data speeds and greater future-proofing as 4G networks gradually become less prioritized. The C73 5G also pairs this with a newer Bluetooth 5.3 implementation versus the A5x's Bluetooth 5.0, which brings incremental improvements in connection stability and energy efficiency — a modest but real advantage for wireless peripheral users.

The Oppo A5x strikes back with one unique hardware feature: a built-in infrared sensor, which the C73 5G lacks entirely. This allows the A5x to function as a universal remote control for TVs, air conditioners, and other IR-compatible appliances — a genuinely practical convenience that a meaningful subset of users relies on daily. Both phones share the same Wi-Fi standards, dual SIM support, expandable storage, USB-C 2.0, fingerprint scanner, GPS with Galileo, and accelerometer, leaving no further gaps worth highlighting.

This category is a split decision with different winners for different use cases. The Realme C73 5G holds the broader connectivity edge — 5G support is a significant long-term advantage for mobile data users. However, the Oppo A5x's infrared sensor is a tangible feature that the C73 5G simply cannot replicate, making it the more versatile device for smart home and appliance control. Users who prioritize mobile network speed should lean toward the C73 5G; those who value IR functionality should favor the A5x.

The miscellaneous spec group offers very little to differentiate the two devices. Every data point provided — video light presence, absence of sapphire glass, flat display, and no e-paper panel — is identical across both the Oppo A5x and Realme C73 5G. This is an unambiguous tie, and buyers should not factor this category into their decision at all.