Strip away the megapixel count and these two camera systems are, for all practical purposes, identical. Both phones share the same single-lens rear setup, the same 1080p at 30fps video ceiling, identical autofocus technologies (phase-detection and touch), and the same feature set spanning HDR mode, slow-motion, panorama, timelapse, and manual controls for ISO, focus, exposure, and white balance. The front camera is also a straight tie: both offer a 5MP shooter at f/2.2 with no flash.
The sole differentiator is the main camera resolution — 50 MP on the Realme C71 versus 32 MP on the Oppo A5x. More megapixels can allow for greater detail in well-lit conditions and provide more headroom for cropping into a shot without significant quality loss. However, megapixel count alone is a limited indicator of overall image quality; sensor size, pixel size, and image processing — none of which are specified in this data — ultimately determine how those pixels perform in real scenes, particularly in low light.
Based strictly on the provided specs, the Realme C71 holds a narrow edge in this category purely on account of its higher 50 MP resolution, which offers more cropping flexibility and finer detail capture on paper. That said, given how tightly matched every other camera attribute is, this advantage is conditional rather than categorical — users prioritizing camera performance should weigh this alongside processing capability, which falls under the performance group.