vivo X300 vs OnePlus 15: Which One You Should Buy

The flagship battle is louder than ever, and the vivo X300 vs OnePlus 15 showdown brings real excitement to India’s premium segment. Both phones sit in the same pricing zone, yet they focus on different strengths. The vivo X300 starts at ₹75,999, while the OnePlus 15 begins at ₹72,999. They may look similar on paper, but the experience they deliver is completely different. One brings compact luxury and next-level cameras. The other pushes performance and battery life to the edge. Here’s the simple, spicy, and clear comparison you need.

Design: Compact vs Confident

The vivo X300 stands out with its extremely bright display. It reaches 4500 nits in local areas and 2000 nits globally, making outdoor visibility excellent. The colors remain rich even under harsh sunlight. Furthermore, the UltraMotion feature boosts refresh rates in apps that usually stay locked, making the UI noticeably smoother.

On the other hand, the OnePlus 15 impresses with the world’s first 1.5K 165Hz display. This brings ultra-fast motion, ideal for gamers and heavy multitaskers. The 1800-nit peak is good, but it cannot match vivo’s sunlight clarity.

Verdict on design:
Pick vivo X300 for compact elegance.
Pick OnePlus 15 for a tougher and futuristic feel.

Display: Brightness vs Speed

The vivo X300 shines—literally. Its 6.31-inch LTPO display hits 4500 nits peak brightness in local areas and 2000 nits globally. Outdoor visibility is fantastic. Colors stay consistent even under harsh sunlight. Its UltraMotion feature lifts refresh rates across apps, making scrolling lively.

The OnePlus 15 brings the world’s first 1.5K 165Hz panel. It’s fast. It’s fluid. It’s built for gamers. The 1800-nit peak is good, but not as bright as the vivo outdoors.

Verdict on display:
Pick vivo X300 for brightness and accuracy.
Pick OnePlus 15 for ultra-smooth refresh and gaming.

Software & AI: Smooth vs Animated

The vivo X300 runs OriginOS 6, which feels animated yet refined. The redesigned icons, Flip Cards, and updated control center give it personality. Additionally, Origin Island and Office Kit offer smart suggestions, easy multitasking, and smooth device-to-PC transitions.

The OnePlus 15, however, follows a cleaner approach with OxygenOS 16. It focuses on fast, predictable performance. Features such as Plus Mind, on-device AI tools, improved multitasking, and the Predictive Back Gesture create a fluid experience. The system feels light, quick, and organized.

If you enjoy visual richness and playful touches, the vivo X300 suits you better. If you prefer a cleaner, faster, more functional UI, the OnePlus 15 delivers.

Verdict on software:
Pick vivo X300 for visual richness.
Pick OnePlus 15 for fluid speed and deeper AI tools.

Performance: Strong vs Stronger

The vivo X300 uses the MediaTek Dimensity 9500 chipset, and it handles daily use extremely well. Multitasking stays smooth, while games run at high settings with stable performance. The Glacier Cooling System also keeps temperatures controlled during long sessions.

Even so, the OnePlus 15 remains the more powerful device. The Snapdragon 8 Elite Gen 5 dominates benchmarks and handles heavy workloads without slowing down. Moreover, its Cryo-Velocity Cooling System and aerogel layers allow it to maintain higher performance for longer periods.

Anyone who values maximum speed should lean toward the OnePlus 15. But the vivo X300 still offers strong, reliable performance with better thermal comfort.

Verdict on performance:
Pick OnePlus 15 if you want the fastest engine in the segment.
Pick vivo X300 if you want strong performance with better thermals.

Camera: Accuracy vs Power

Here’s where the story takes a sharp turn.

The vivo X300 shines brightest in the camera department. Its 200MP ZEISS main camera delivers incredible detail without oversharpening. Even zoomed images stay crisp, thanks to the LYT-602 telephoto sensor and 100x HyperZoom. Portraits look natural with ZEISS Natural Portrait, and low-light photos maintain depth, accuracy, and clean tones. The 50MP front camera with autofocus also produces excellent selfies.

The OnePlus 15 brings a capable triple 50MP setup with its DetailMax engine. Daylight shots look realistic, and portraits offer good separation. Its video capabilities, especially Dolby Vision 4K 120fps, give creators flexibility.

Despite this, the gap remains clear. The vivo X300 consistently produces better detail, richer low-light performance, and superior zoom results.

Verdict on camera:
vivo X300 wins clearly.

Battery: Endurance vs Efficiency

The vivo X300 includes a 6040mAh battery with strong optimization. It easily lasts a full day, and its 90W wired charging plus 40W wireless charging keep it practical. The focus here is balance instead of brute force.

The OnePlus 15 takes the opposite approach. Its huge 7300mAh battery pushes endurance far ahead of most rivals. Furthermore, 120W wired charging and 50W wireless charging make it one of the fastest-charging flagships available. Bypass charging also helps during gaming.

Heavy users will appreciate the OnePlus 15 more, while standard users will find the X300 adequate and efficient.

Verdict on battery:
OnePlus 15 wins for heavy users.

Final Verdict

If you love compact design, natural photography, and a premium feel that stays easy on the hand, the vivo X300 is your clear winner. It’s built for camera lovers, everyday users, and anyone who wants an all-rounder that excels where it matters most—the camera.

But if you chase raw performance, long battery life, gaming speed, and the fastest display out there, the OnePlus 15 is your pick.

Both are excellent.
But they are made for different people.
Choose the X300 for photography. Choose the OnePlus 15 for performance.