Oppo F31 Pro Plus 5G VS Vivo T4 5G

Both phones share a remarkably similar physical footprint — nearly identical heights (163.1 mm vs 163.4 mm), comparable widths, and a slimmer-than-average profile — making them feel like near-twins in hand. The Oppo F31 Pro Plus 5G is marginally thinner at 7.7 mm versus the Vivo T4 5G's 7.9 mm, and weighs slightly more at 204 g compared to 199 g. Neither difference is meaningful in daily use; both phones fall in the same comfortable handling range and neither is a rugged or foldable device.

The most consequential design distinction is water protection. The Oppo carries an IP68 rating, meaning it is fully waterproof and can withstand submersion in water — typically up to 1.5 meters for 30 minutes. The Vivo holds an IP65 rating, which certifies only resistance to low-pressure water jets and dust, but offers no protection against submersion. In practical terms, dropping the Oppo in a sink, puddle, or pool is survivable; the same scenario with the Vivo poses a real risk of damage.

For design, the Oppo F31 Pro Plus 5G holds a clear edge solely due to its superior IP68 waterproofing. For users who prioritize durability and peace of mind near water, this is a meaningful real-world advantage. All other physical design attributes between the two are effectively equivalent.

On paper, these two displays look nearly identical — both use OLED/AMOLED panels, both hit 120Hz, and their screen sizes differ by a negligible 0.03 inches. The meaningful split happens along two axes: sharpness and brightness. The Oppo F31 Pro Plus 5G renders at a higher resolution of 1280 x 2800 px, translating to a notably sharper 453 ppi pixel density, while the Vivo T4 5G lands at a more standard 1080 x 2392 px and 388 ppi. That 65 ppi gap is perceptible — text appears crisper and fine detail in photos or video is more defined on the Oppo at normal viewing distances.

Flip the advantage, though, and the Vivo T4 5G commands attention with a 1300 nits typical brightness rating — more than double the Oppo's 600 nits. In outdoor conditions, especially under direct sunlight, this difference is dramatic. At 600 nits the Oppo will struggle to remain legible on a bright day; at 1300 nits the Vivo stays comfortably readable. For users who spend significant time outside, this is not a minor spec gap — it directly affects usability. Neither phone supports HDR10, HDR10+, or Dolby Vision, so both are on equal footing for premium streaming content.

This group is a genuine trade-off rather than a clean win. The Oppo holds the edge for sharpness-focused use cases like reading, detailed gaming, or close-up photography review. The Vivo T4 5G has the stronger real-world advantage for most users, however, as its dramatically higher brightness ensures the display remains functional across a wider range of lighting environments — an impact felt daily in a way that the ppi difference often is not.

At first glance, the two chipsets sound almost identical — and in many respects they are. Both phones pack 12GB of DDR5 RAM, 256GB of storage, a 4nm fabrication process, identical memory bandwidth, and share the same cluster CPU configuration for their middle and efficiency cores. The critical distinction sits in the chipset tier: the Oppo F31 Pro Plus 5G runs the Snapdragon 7 Gen 3, while the Vivo T4 5G uses the Snapdragon 7s Gen 3. The ″s″ designation marks a step-down variant — and that difference surfaces in the CPU's peak core, where the Oppo edges ahead at 2.63 GHz versus 2.5 GHz on the Vivo.

The GPU story is more nuanced. The Oppo carries the higher-tier Adreno 720, while the Vivo pairs its chip with an Adreno 710. Interestingly, the Vivo's GPU runs at a higher clock speed — 1050 MHz versus 950 MHz — but the architectural advantage of the Adreno 720 generally makes it the stronger graphics processor overall. The Oppo's higher 6W TDP versus the Vivo's 5W reflects this: more thermal headroom typically correlates with higher sustained performance, though it can also mean slightly more heat under load.

For the vast majority of everyday tasks — social media, video streaming, casual gaming — both phones will feel virtually identical given their shared RAM, storage, and process node. Where the gap matters is in sustained heavy workloads or graphically demanding games, where the Oppo F31 Pro Plus 5G holds a modest but real performance edge thanks to its higher-tier chipset and GPU architecture.

Rarely do two competing phones produce a camera spec sheet this identical. Both feature a 50 MP + 2 MP dual rear camera with matching apertures, OIS, phase-detection autofocus, 4K/30fps video, and an identical 32 MP front camera. The full feature set — slow motion, HDR mode, timelapse, panorama, manual controls for ISO, exposure, focus, and white balance — is mirrored exactly across both devices. For rear camera capability, these phones are, based on the provided specs alone, indistinguishable.

The only measurable difference in this entire group is the front camera aperture. The Vivo T4 5G's selfie lens opens to f/2.0, versus f/2.4 on the Oppo F31 Pro Plus 5G. A wider aperture admits more light, which translates directly to brighter, less noisy selfies in dim environments — indoors, at evening events, or in low-lit settings where most front-camera photos are actually taken. It is a single spec, but it targets a scenario that matters to many users.

Overall, the cameras are a near-perfect tie. For rear photography and video, there is no differentiator in the provided data. The Vivo T4 5G earns a narrow edge strictly on the basis of its wider f/2.0 selfie aperture, which offers a practical low-light advantage for self-portraits — a meaningful distinction for selfie-focused users, but inconsequential for those who primarily shoot with the rear camera.

The operating system category produces the most clear-cut result of any group in this comparison: every single spec is identical. Both phones run Android 15, share the same privacy toolkit — including location controls, camera/microphone permissions, and app tracking blocking — and offer the same productivity and usability features such as split-screen multitasking, Picture-in-Picture, dynamic theming, dark mode, offline voice recognition, and on-device machine learning. Neither device receives direct OS updates, and neither supports Wi-Fi password sharing, focus modes, or PC mode.

With no differentiating data point anywhere in this group, the software experience these two phones deliver is, by the provided specs, functionally equivalent. Notably, both ship with Android 15 out of the box, meaning users get access to the latest privacy enhancements and system features on day one — a positive shared trait worth acknowledging, even in a tie.

This group is a complete draw. There is no basis in the provided specs to give either phone an advantage in operating system features. A buyer's decision here should rest entirely on the other specification groups rather than any software differentiation.

Both phones enter the battery comparison with genuinely large cells — well above the mainstream 5000 mAh benchmark — and both support fast charging without wireless charging. The Vivo T4 5G pulls slightly ahead on both metrics: a 7300 mAh battery versus the Oppo F31 Pro Plus 5G's 7000 mAh, and faster wired charging at 90W compared to 80W. Individually, each gap is modest; together, they point consistently in the same direction.

In practical terms, the 300 mAh difference at this capacity tier translates to a marginal extension in screen-on time — likely measured in minutes rather than hours under typical use. More tangible is the charging speed advantage: at 90W versus 80W, the Vivo will recover from a low battery noticeably faster, which matters in the real world when you have limited time to charge before heading out. Neither phone offers wireless charging, so both users are tethered to a cable regardless.

The Vivo T4 5G holds the edge in this category — not by a dramatic margin, but consistently across both capacity and charging speed. For users who prioritize battery endurance and quick top-ups, the Vivo's combination of a larger cell and faster charging makes it the more capable option here.

Audio is where the gap between these two phones becomes the most lopsided of any category in this comparison. The Oppo F31 Pro Plus 5G ships with stereo speakers, support for LDAC, aptX, and aptX HD — a comprehensive wireless audio stack. The Vivo T4 5G, by contrast, has none of these: no stereo speakers, and no high-quality Bluetooth audio codec support whatsoever.

Each of these omissions carries real-world weight. A single mono speaker versus stereo is immediately noticeable when watching videos, playing games, or listening to music without headphones — stereo output creates spatial separation and a fuller sound stage. On the wireless side, LDAC transmits audio at up to three times the bitrate of standard Bluetooth, making it the preferred codec for high-fidelity listening over quality wireless headphones. aptX HD similarly targets hi-res audio over Bluetooth. Without any of these codecs, the Vivo is limited to standard Bluetooth audio quality regardless of how good the headphones paired to it are.

The Oppo F31 Pro Plus 5G wins this category decisively. Whether listening through the built-in speakers or premium wireless headphones, it offers a substantially richer audio experience on every front that the provided specs measure. For music listeners and media consumers, this is one of the more impactful differences across this entire comparison.

Across the broad connectivity checklist, these two phones are closely matched — both support 5G, Wi-Fi 6, Bluetooth 5.2, dual SIM, USB Type-C, GPS with Galileo, an infrared sensor, and a full motion sensor suite. Two differentiators stand out, however. The Oppo F31 Pro Plus 5G includes NFC, while the Vivo T4 5G does not. NFC enables contactless payments, quick Bluetooth pairing, and transit card functionality — features that have become a daily-use expectation for many users. Its absence on the Vivo is a meaningful omission for anyone embedded in a tap-to-pay workflow.

The second gap is in peak 5G download speed: the Oppo is rated at 5000 Mbits/s versus the Vivo's 2900 Mbits/s. In practice, real-world 5G speeds are constrained by network availability and signal conditions, so most users will rarely approach either ceiling. That said, the Oppo's higher rated throughput does indicate a more capable modem, which can translate to better performance on congested networks or in areas with weaker signal.

The Oppo F31 Pro Plus 5G takes a clear win here. The addition of NFC alone is enough to tip the balance for a significant share of users, and the higher rated download speed reinforces its advantage. The Vivo matches the Oppo on every other connectivity feature, but the absence of NFC is a tangible daily-use limitation that is difficult to overlook.

The miscellaneous category is brief and conclusive: every spec listed is identical. Both the Oppo F31 Pro Plus 5G and the Vivo T4 5G include a video light, and neither features a sapphire glass display, curved display, or e-paper display. There is nothing in this group that separates them.

This is a complete tie. Buyers should weigh the other specification groups — particularly audio, connectivity, and display — when making their final decision, as this category offers no differentiating information.