Personally every oil feels different. New oil makes it feels fresh. As it age's it makes the engine a bit sluggish. Mineral ages more quickly than synthetics. Even between different brands each engine oil makes the engine slightly behave differently. Some brands feels thinner thus making the engine more rev happy some feels a bit thicker so a bit sluggish.

Key is to experiment. Stick with the factory spec then upgrade the oil quality as needed to suit your service interval. My scooter uses mineral Yamaha lube @2k interval. I didn't feel any drop in power compared to when I used fully or semi at the same interval. My Y15 I use semi because despite the factory recommends 3k for semi and 5k for fully. I found that I feel the motor become sluggish at 2k for semi and 3k++ for fully. So I choose the cheaper oil and service sooner. I will splurge for fully if I plan for a long ride with my friends.

This is all based on my butt Dyno. So take it with a grain of salt. At the end of the day its your wallet and your time to service your bike. Do what suits you just make sure don't skip any of the service interval or skimp on changing the oil filter