Oppo F31 5G VS Vivo T4 5G

Both the Oppo F31 5G and Vivo T4 5G share a non-rugged, non-foldable form factor, but they diverge meaningfully on water resistance and physical dimensions. The Oppo F31 5G carries an IP68 rating, meaning it can withstand submersion in water — a significant real-world advantage for users who are near pools, rain, or accidental spills. The Vivo T4 5G, by contrast, is rated IP65, which covers protection against water jets but not immersion. For most everyday scenarios this difference is manageable, but for users who want genuine waterproofing, the Oppo has a clear edge.

On dimensions, the Vivo T4 5G is noticeably taller (163.4 mm vs 158.2 mm) and slightly wider (76.4 mm vs 75 mm), making it a larger device overall — reflected in its greater volume of roughly 98.6 cm³ compared to the Oppo's 94.9 cm³. The Vivo is also heavier at 199 g versus the Oppo's 185 g, a 14-gram difference that is perceptible during extended one-handed use. Thickness is nearly identical at 7.9 mm vs 8 mm, so neither phone feels meaningfully slimmer in hand.

Overall, the Oppo F31 5G holds a design advantage: it is more compact, lighter, and offers superior water protection. The Vivo T4 5G's larger frame may appeal to users who prefer a bigger display footprint, but it concedes ground on both portability and durability credentials.

Both phones share a strong display foundation — OLED/AMOLED panels, a 120Hz refresh rate, branded damage-resistant glass, and identical 1080p-class resolutions. In practice, this means both deliver punchy colors, deep blacks, and smooth scrolling. The differences, however, emerge in size and brightness, and one of them is substantial.

The Vivo T4 5G features a larger 6.77″ screen versus the Oppo F31 5G's 6.57″, giving it more real estate for media and multitasking. Pixel density is nearly identical (388 ppi vs 397 ppi), so sharpness is indistinguishable in everyday use — neither has a meaningful edge there. Where the Vivo pulls ahead decisively is brightness: its 1300 nits typical brightness more than doubles the Oppo's 600 nits. This is not a marginal gap — at 600 nits, outdoor visibility in direct sunlight can become a genuine struggle, while 1300 nits ensures the screen remains comfortably legible even in harsh lighting conditions.

The Vivo T4 5G holds a clear display advantage. The larger screen and dramatically higher brightness make it the stronger choice for outdoor users or anyone who consumes a lot of video content. The Oppo F31 5G's display is by no means poor, but the brightness deficit is a meaningful real-world limitation that tips the scales decisively in the Vivo's favor for this category.

The silicon gap between these two phones is significant. The Oppo F31 5G runs on the MediaTek Dimensity 6300, built on a 6nm process, while the Vivo T4 5G is powered by the Qualcomm Snapdragon 7s Gen 3 on a more advanced 4nm node. A smaller process size generally means greater power efficiency and thermal headroom — the Vivo's chip can sustain higher performance for longer without throttling under load.

The benchmark numbers reinforce this gap decisively. The Vivo T4 5G scores 3239 multi-core and 1162 single-core on Geekbench 6, compared to the Oppo's 2012 multi-core and 782 single-core — roughly a 60% lead in multi-threaded workloads and a 49% lead in single-threaded tasks. Single-core performance in particular governs everyday responsiveness — app launches, UI snappiness, and general fluidity — so this is not an abstract advantage. The Vivo also ships with 12GB of DDR5 RAM running at 3200 MHz against the Oppo's 8GB of DDR4 at 2133 MHz, and its memory bandwidth of 25.6 GB/s versus 17.07 GB/s means data moves to the processor faster, further supporting heavier multitasking and gaming workloads.

Across every meaningful performance dimension — CPU speed, GPU clock, RAM capacity, memory generation, and benchmark results — the Vivo T4 5G holds a commanding and unambiguous advantage. For users who game, multitask heavily, or simply want a phone that stays fast over its lifetime, the Vivo is the clear choice in this category.

The rear camera systems on these two phones are nearly carbon copies of each other — identical 50 MP + 2 MP dual-lens setups, matching apertures, the same 4K/30fps video ceiling, and an equivalent feature set covering phase-detection autofocus, slow-motion, HDR, and manual controls. For primary photography, users can expect a comparable experience from both devices.

The differentiators emerge when you look beyond the main sensor. The Vivo T4 5G includes optical image stabilization (OIS), which the Oppo F31 5G lacks entirely. OIS is particularly impactful for video recording and low-light photography — it physically compensates for hand tremor, producing smoother footage and sharper handheld shots in challenging conditions. This is a meaningful real-world advantage that cannot be replicated by software stabilization alone. On the selfie side, the Vivo also pulls ahead with a 32 MP front camera versus the Oppo's 16 MP, and a wider f/2.0 aperture compared to f/2.4 — meaning more detail and better light intake for self-portraits and video calls.

The Vivo T4 5G takes a clear edge in this category. The rear camera parity is quickly overshadowed by OIS — a feature that elevates everyday video and low-light performance — and a substantially stronger front camera. For users who prioritize video quality or selfies, the Vivo is the more capable shooter.

This is a rare instance of complete parity. Both the Oppo F31 5G and Vivo T4 5G run Android 15 and share an identical feature set across every single tracked specification in this category — from privacy controls like location and camera/microphone permissions, to usability features like dark mode, dynamic theming, split-screen, and Picture-in-Picture. Neither receives direct OS updates, and neither supports features like cross-site tracking blocking, Wi-Fi password sharing, focus modes, or PC mode.

For the user, this means the software experience out of the box is governed not by this spec layer, but by the custom Android skins each manufacturer lays on top — which fall outside the scope of the provided data. The shared Android 15 base ensures both phones benefit from the same generation of privacy architecture, on-device machine learning capabilities, and system-level features like full-page screenshots, offline voice recognition, and multi-user support.

Based strictly on the provided specifications, this category is a complete tie. There is no differentiator here that favors either device — every tracked feature is identical. The operating system should not factor into a decision between these two phones.

Both phones arrive with generously sized batteries that sit well above the mainstream midrange norm — the Oppo F31 5G packs a 7000 mAh cell while the Vivo T4 5G edges ahead with 7300 mAh. In practice, the 300 mAh difference is modest and unlikely to translate into a perceptibly longer day for most users; both phones are firmly in multi-day battery territory under typical usage patterns.

Where the two separate slightly is charging speed. The Vivo supports 90W fast charging against the Oppo's 80W, meaning the Vivo's larger battery will still replenish faster in absolute terms. The gap is not dramatic — at these wattages, both phones are capable of rapid top-ups — but the Vivo's combination of a bigger cell and faster charging gives it a marginal but real advantage for users who are frequently time-constrained. Neither phone offers wireless charging, and both have sealed, non-removable batteries.

The Vivo T4 5G holds a narrow edge in this category — larger capacity and faster charging, even if neither gap is individually decisive. For pure endurance and replenishment speed, the Vivo is the slightly stronger package, though Oppo F31 5G users are unlikely to feel meaningfully short-changed given the size of both batteries.

Audio is where the Oppo F31 5G pulls its most decisive advantage of this entire comparison. It features stereo speakers — a fundamental hardware difference that delivers wider soundstage, better channel separation, and noticeably more immersive audio for media consumption and gaming. The Vivo T4 5G, by contrast, offers only a mono speaker setup, which sounds comparatively narrow and less engaging at any volume level.

The gap widens further over Bluetooth. The Oppo supports aptX, aptX HD, and LDAC — three high-resolution wireless audio codecs that allow compatible headphones to receive significantly more audio data than standard Bluetooth, preserving detail and dynamic range closer to wired quality. The Vivo T4 5G supports none of these codecs, meaning wireless audio is limited to lower-fidelity SBC or AAC transmission regardless of how premium the connected headphones are. For users who invest in quality wireless audio gear, this is a meaningful limitation. Neither phone includes a 3.5mm headphone jack or FM radio.

The Oppo F31 5G wins this category convincingly. Stereo speakers alone would be enough to tip the scales, but the addition of LDAC and aptX HD support makes it the substantially stronger audio device — both for speaker listening and for users who prioritize high-quality wireless headphone performance.

Connectivity tells a split story here, with each phone holding meaningful advantages in different areas. The Vivo T4 5G supports Wi-Fi 6 (802.11ax) — a standard the Oppo F31 5G lacks — which delivers faster throughput, lower latency, and better performance in congested network environments like offices or apartments with many connected devices. The Oppo counters with a higher peak cellular download speed of 3300 Mbits/s versus the Vivo's 2900 Mbits/s, and a newer Bluetooth 5.4 versus the Vivo's 5.2, which can offer marginal improvements in connection stability and energy efficiency.

The most consequential single difference in this category, however, is NFC. The Oppo F31 5G includes it; the Vivo T4 5G does not. NFC is the backbone of contactless payments, quick Bluetooth pairing, and transit card integration — for many users, its absence on the Vivo is a daily-use limitation that is hard to overlook. On the sensor side, the Vivo reclaims some ground with a gyroscope and an infrared sensor, neither of which the Oppo carries. The gyroscope enables motion-based gaming and more accurate navigation, while the IR blaster lets the Vivo function as a universal remote for TVs and appliances.

This category is genuinely split, but the Oppo F31 5G holds the narrower overall edge — NFC is a broadly impactful everyday feature that affects more users more often than a gyroscope or IR blaster. That said, users who prioritize Wi-Fi 6 performance or motion-sensitive applications will find the Vivo T4 5G better suited to their needs.

The miscellaneous specifications for these two phones are identical across every tracked data point. Both feature a video light, and neither offers a sapphire glass display, a curved display, or an e-paper display — premium or niche hardware features that remain uncommon at this segment of the market.

This category is a complete tie. There is no differentiator present in the provided data that gives either the Oppo F31 5G or the Vivo T4 5G any advantage, and neither spec here is significant enough to influence a purchasing decision on its own.