The "Hypercar" thing is what brings in most of the confusion as it degrades the term super-car, according to Ferrari the original GTO's and the F40/50/60 are the only super cars they have ever made, the F3xx's are merely sports cars.
Case in point the Honda NSX, arguments always erupt about wither its a supercar or not, in reality it was a better car than the Ferari it was designed to compete with (348) in every way conceivable (barring a Ferrari badge ofc) despite being about half the price, in addition it was also better than the 355 and comparable to the 360 (the 360CS was the first 3xx to match the NSX-R's time round the ring) so you would be forgiven for thinking it was a supercars because it could hang with other alleged supercars.
For me a super car has to be just that, reliability isn't important, it has to look like something a schoolchild would want as a toy (that would always beat the normal car toys in a race) and be insane from the design POV, it doesn't even have to be that good (i.e Countach, XJ220) because you don't need to know how fast/powerful it is, it just has to have that fire that makes you imagine it being better than all other cars like a real super hero.