My advice: work with an old Apple computer and put this against a brand new super giga overclocked Windows hardware monster. Apple focuses exactly on perceived performance first and foremost. On all my devices - MacBook Pro 13 from 2013, MacBook Air 2018, iPhone 6 - one thing is always smooth no matter what: UI interaction and transitions.
I read a lot about Apple and Google engineering and I remember that they put a priority on perceived performance first. I think there is a 300ms seconds threshold under which optimization brings in no additional benefit, however massive discomfort above this limit in that humans perceive animations as jerky, which leads to feelings of discomfort.
Jobs demanded that Apple Safari had a one or two second rule AFAIK, so that any new feature must not slow down opening up time.
Displays and chip design is also aimed at this perceived performance metric.
Windows always appears jerky and laggy to me, no matter the age or raw performance the machine got, while any Apple device is guaranteed to feature smooth UI interaction no matter CPU load.
I love it and as a product manager it became a mantra for my enterprise software SaaS platform a mantra as well. Customers love it, they feel taken care of. And that’s great.