Compare Mobile Phones Side-by-Side

The OnePlus Ace 7 Pro looks like the far stronger pick here. Its biggest advantages are not small spec-sheet wins — they affect daily use directly. A 9000mAh battery is in a completely different class from the Galaxy S30’s 4200mAh cell, and the extra RAM gives the OnePlus much more breathing room for multitasking, heavy apps, and longer-term use.

The display comparison also leans OnePlus, especially if you care about smooth scrolling or gaming. Both phones have the same 6.78-inch size, but 185Hz versus 120Hz gives the Ace 7 Pro the more aggressive, performance-focused feel. Samsung’s Galaxy S30 may still appeal if you specifically prefer Samsung’s ecosystem or software style, but based strictly on the hardware listed here, it feels underpowered beside the OnePlus.

For most buyers, the Ace 7 Pro is the more sensible choice. The Galaxy S30 would need a major price advantage to justify its smaller battery and much lower RAM.