I think you mentioned that in the other thread that the main reason you bought the i7 for the added storage. If thats the case, youre not “stoopid”, youre just the victim of a company not having the capacity to cater to every single person needs.
Onto the technical stuff:
The i7-7Y75 is rated at 3.6 GHz turbo vs 3.2 GHz for the i5-7Y54. That is over 10% difference and that would definitely be noticeable. After around half a minute (customizable in XTU?), both models will throttle to 7W power limit. The speed that can be achieved within the 7W limit varies from unit to unit. Intel guarantees 1.6 GHz (base clock), but nearly all units, if not all can get to at least 2 GHz. Anything above that is pure lottery.
Unlike what most people believe, burst performance (turbo clock) is arguably more important than sustained load performance (base clock), as most tasks are burst-y, where there is a large amount of work to do for a short time, followed by low or no CPU load. Apart from games and rendering, I couldn’t think of any non-burst-y loads.
I dont know where your .1 GHz comes from