It released at year later, it was obvious from day one that SCorpio would do more.
Think about Xbox 360 vs PS3, was 360 half-baked or did it just release a year earlier?
Same thing will happen again no matter who goes first with next generation.
Sony sits on a huge user base but I still think they'll be the one who's eventually forced to start the next generation, Scorpio seems to do so much more which could pay off later on to help it stay okay a bit longer.
Your comparison doest work as 360 was still ahead at the end of the generation and was the template for next gen consoles, Scorpio is looking to be the same, Freesync, BC, global super sampling, 4K BR, new cooling system etc. The jump between X1/PS4 to Scorpio dwarfs the jump to pro. Sony's flakey implementation of 'modes', some games not supporting pro and older games not receiving any enhancement does seem half arsed. I mean I didn't really feel compelled to upgrade from base PS4. The difference between Scorpio and Pro can easily be felt imo.