Which university is easier to get into in early decision and regular decision?
The admission stats for both schools can be found online.
On average, Cornell is slightly easier to get into than Penn. YMMV
Cornell and Penn are excellent schools, difficult to get into, demanding, and not for everyone. Many students who think they want to attend these schools would hate the level of expectations, if they actually got admitted. Be sure you know what you are getting yourself into, and that it is right for you.
Given the low admit rate, any given day there are Cornell admits turned away at Penn and Penn admits turned away at Cornell. Of course there are many many more simply rejected at both.
@MrGreenwood In general Cornell is a bit easier to get into than Penn.