One key point is here: "Smarter, stronger...Superior. " Keyword, smarter...so who is smarter than Peter? Unless the ad is lying that is.
Advertisements, solicits, interviews and even comic covers are all well known for being......"slightly misleading" at times.
Perhaps it is Peter and he's using his intellect more, hence "Smarter". Maybe Ock does download into Peter and Peter maintains dominance but also gets Doc Ock's IQ added to his own.
Or maybe it is all a pack of nonsense that will be wiped with the next press of the big red reset button or faustian bargain.