The difference is that Sun and Moon was a swan song for Pokemon as an exclusively handheld game and the 3DS as a whole that intentionally pushed the system to its very limit…

While Pokemon Let's Go is a fanservice loaf hacked out to keep the money pits full while they work on the next actual game.

Not sayin' PLG is gonna be BAD, it looks great, it just very deliberately does not have the same level of effort put in. We'll see what the comparison is like when Pokemon Hope and Pokemon Dreams come out for the switch.

Not really, though? Comparing the trailer to actual Gen 7 gameplay, Let's GO has much better quality models and lighting. The resolution of this image just disguises the flaws from Gen 7 and blurs the quality of Let's GO.