Oppo F31 Pro 5G VS Vivo T4 5G

In terms of physical dimensions, the Vivo T4 5G is noticeably taller (163.4 mm vs 158.2 mm) and slightly wider (76.4 mm vs 75 mm), resulting in a larger overall volume. This makes the Oppo F31 Pro 5G the more compact and one-hand-friendly option. The weight difference is modest — the Vivo T4 5G is 9 g heavier at 199 g — which is unlikely to be a deal-breaker in everyday use, though the Oppo edges ahead for those prioritizing a lighter feel. Thickness is virtually identical at 8 mm vs 7.9 mm, so neither phone stands out as noticeably slimmer in hand.

Where the two phones diverge most meaningfully is water resistance. The Oppo F31 Pro 5G carries an IP68 rating, meaning it is fully waterproof and can withstand submersion in water up to a defined depth and duration. The Vivo T4 5G, by contrast, holds an IP65 rating, which offers protection against water jets but not submersion. In real-world terms, the Oppo can survive accidental drops in pools or sinks, while the Vivo is better suited to handling splashes and rain. This is a significant practical distinction for users who are active outdoors or accident-prone.

Neither device features a rugged build or a foldable form factor, keeping both in the standard smartphone category. Overall, the Oppo F31 Pro 5G holds a clear design edge here — it is more compact, lighter, and offers meaningfully stronger water protection with its IP68 certification.

Both phones share a strong display foundation — OLED/AMOLED panels with a 120Hz refresh rate and branded damage-resistant glass — so neither has a structural advantage in terms of technology type or smoothness. The resolution difference is negligible, and both land close to 390+ ppi, meaning sharpness is effectively indistinguishable to the naked eye in everyday use.

The standout differentiator is brightness. The Vivo T4 5G delivers a typical brightness of 1300 nits, more than double the Oppo F31 Pro 5G's 600 nits. In practice, this gap is transformative for outdoor visibility — at 1300 nits, content remains comfortably readable in direct sunlight, while 600 nits can struggle in bright conditions. For users who frequently use their phone outdoors, this is a consequential real-world difference. The Vivo also offers a slightly larger 6.77″ screen versus 6.57″ on the Oppo, which benefits media consumption and productivity tasks, though at the cost of a bulkier form factor as noted in the design comparison.

Neither device supports HDR10, HDR10+, or Dolby Vision, so both are on equal footing for premium streaming content rendering. Overall, the Vivo T4 5G holds a clear display edge, driven almost entirely by its dramatically superior brightness, which elevates everyday usability in a way that screen size or pixel density alone cannot.

At a surface level, these two phones look nearly identical on paper — same 256GB storage, same 12GB RAM, same 4nm fabrication process, and the same 8-thread big.LITTLE architecture. But the choice of chipset tells a more nuanced story. The Vivo T4 5G runs on the Qualcomm Snapdragon 7s Gen 3, while the Oppo F31 Pro 5G uses the MediaTek Dimensity 7300 — and benchmark results confirm a meaningful performance gap in Qualcomm's favor.

The Vivo scores 3239 in Geekbench 6 multi-core and 1162 in single-core, compared to the Oppo's 2932 and 1026 respectively. The single-core lead is particularly relevant for day-to-day responsiveness — app launches, UI interactions, and general snappiness are more dependent on single-core performance than multi-core. A roughly 13% single-core advantage is perceptible in real use. One counterpoint: the Oppo's RAM runs at 6400 MHz versus the Vivo's 3200 MHz, which could theoretically benefit memory-intensive tasks, though in practice the chipset architecture and overall benchmark results still favor the Vivo.

GPU clock speeds are essentially tied at ~1050 MHz, so gaming performance differences will stem primarily from the GPU architecture itself rather than clock speed. Overall, the Vivo T4 5G holds a clear performance edge — its Snapdragon 7s Gen 3 consistently outscores the Dimensity 7300 in both single and multi-core workloads, making it the stronger choice for users who prioritize sustained performance.

Rarely does a camera comparison yield such a near-perfect mirror image — and that is exactly the case here. Both phones feature a 50 MP + 2 MP dual rear camera setup with identical apertures, OIS, phase-detection autofocus, 4K recording at 30fps, and the same manual control suite. For practical purposes, the rear camera hardware specifications are indistinguishable between the two devices.

The one measurable difference lies in the front camera aperture. The Vivo T4 5G selfie lens opens to f/2.0, versus f/2.4 on the Oppo F31 Pro 5G. A wider aperture lets in more light, which translates to better selfie quality in low-light environments — less noise, more natural exposure without over-relying on software brightening. It is a subtle but genuine advantage for users who frequently shoot selfies indoors or at night.

Beyond that single distinction, the two phones are completely tied on cameras — same resolution, same video capabilities, same feature set front and back. The Vivo T4 5G holds a narrow edge in this category solely due to its wider front aperture, but users who primarily shoot with the rear camera will find no meaningful difference between the two.

This is a complete dead heat. Both phones run Android 15 and share an identical feature set across every tracked specification — from privacy controls like location and camera/microphone permissions, to usability features like split screen, Picture-in-Picture, dynamic theming, and offline voice recognition. There is not a single differentiating data point between them in this category.

The shared software profile is notably well-rounded. Both devices support on-device machine learning, customizable notifications, a battery health check, and an extra dim mode — features that collectively reflect a modern, privacy-conscious Android build. Neither phone receives direct OS updates, which is worth noting for users who prioritize long-term software support, though this applies equally to both.

Given the complete spec-for-spec parity, this category is an absolute tie. A user's experience with the operating system will be essentially identical on either device, and software should play no role in choosing between the Oppo F31 Pro 5G and the Vivo T4 5G.

Both phones pack exceptionally large batteries by mainstream smartphone standards, comfortably clearing the threshold where multi-day use becomes realistic for moderate users. The Vivo T4 5G edges ahead with 7300 mAh versus the Oppo F31 Pro 5G's 7000 mAh — a 300 mAh difference that is modest in absolute terms but directionally favors the Vivo for users who push their device hard.

Charging speed follows the same pattern. The Vivo supports 90W fast charging versus 80W on the Oppo — meaning the Vivo's larger battery will still recharge faster in absolute time. For a device class with batteries this size, that 10W advantage compounds meaningfully: getting a near-full charge during a short break is where faster wattage makes a tangible difference. Neither phone supports wireless charging, so both require a cable for top-ups.

The structural parity — fast charging, non-removable sealed battery, battery indicator — means the overall experience is similar on both. But when every metric points in the same direction, the conclusion is clear: the Vivo T4 5G holds a consistent edge in battery, offering both more capacity and faster replenishment, however slight the margins may be.

Audio is where these two phones diverge most sharply of any category so far. The Oppo F31 Pro 5G brings stereo speakers to the table, while the Vivo T4 5G has only a mono speaker setup. For media consumption — streaming video, gaming, or casual music playback — stereo creates genuine spatial separation that a single speaker simply cannot replicate. This alone is a significant real-world difference for anyone who regularly uses their phone's built-in speakers.

The gap widens further with wireless audio codec support. The Oppo supports aptX, aptX HD, and LDAC — three high-quality Bluetooth audio codecs that enable near-lossless audio transmission to compatible wireless headphones. LDAC in particular, developed by Sony, supports bitrates up to three times higher than standard SBC, making it the gold standard for Bluetooth audio quality. The Vivo T4 5G supports none of these codecs, meaning Bluetooth audio is limited to standard quality regardless of how premium the connected headphones are.

Neither phone includes a 3.5mm headphone jack or FM radio, so both are on equal footing there. But the overall audio picture is unambiguous — the Oppo F31 Pro 5G holds a decisive edge in this category, outclassing the Vivo on both speaker configuration and wireless audio fidelity. For music lovers or heavy media consumers, this difference alone could be a deciding factor.

The connectivity foundations are well-matched — both phones support 5G, Wi-Fi 6, dual SIM, USB Type-C, GPS with Galileo, infrared sensor, fingerprint scanner, and gyroscope. For most users, day-to-day wireless performance will feel essentially identical. That said, three specific differences tip the balance toward the Oppo F31 Pro 5G.

Most critically, the Oppo F31 Pro 5G includes NFC while the Vivo T4 5G does not. NFC is the technology behind contactless payments, transit cards, and quick device pairing — its absence on the Vivo is a genuine functional gap for users who rely on mobile payments or smart accessories. Alongside this, the Oppo's Bluetooth 5.4 versus the Vivo's 5.2 brings modest improvements in connection stability and energy efficiency, and its peak download speed of 3270 Mbps edges out the Vivo's 2900 Mbps — a difference that matters most in congested network environments or when transferring large files over cellular.

The shared sensor suite — accelerometer, compass, gyroscope, and infrared — means neither phone has a meaningful advantage for fitness tracking, navigation, or remote control use cases. But the NFC omission on the Vivo is a hard capability gap, not a marginal spec difference. The Oppo F31 Pro 5G holds a clear connectivity edge, primarily driven by the presence of NFC and a slightly more current Bluetooth implementation.

The miscellaneous category offers nothing to separate these two devices. Both share a video light, and neither features sapphire glass, a curved display, or an e-paper screen — every data point is identical across the board.

This is an unambiguous tie. No spec in this group provides either phone with any meaningful advantage, and it should carry no weight in a purchasing decision between the Oppo F31 Pro 5G and the Vivo T4 5G.