True , most of the time u only see the different if u really pixel to pixel / edge to edge comparison , and i believe vivo with sony/samsung sensor factory have to keep on improving the sensor technology , because the sensor ability already reach the ceiling , to break the ceiling even just half inch up more might request a super duper challenge for them, what we might see x200pro to x300pro look like not "TOO BIG" of improvement , but hey , it's like a F1 car that just looking for maybe 0.1 second faster lap than before might need spend million & month of R&D time , just to get the 0.1 improvement.
So if u ask me there is different? Yes , but in some extreme condition such as low light , challenging light , zoom , because this is where the weakness from a phone sensor vs DSLR Full Frame sensor , but for a normal consumer , like u say , even a RM2k phone main camera is doing no different especially on the daylight. I dont think one will really disappointed with any vivo X series phone photo quality. I mean , u will smile and wish to taking more photo with vivo X series 

good review.

he should have gone further to make a long long video to explain all shooting modes and filter options.

seriously all these are great features but for non vivo users, they don't know all these at all.

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