what i dont get is that
-snip-
70pp play is 2 star map that i fc SSed within 2 minutes
65pp play is a 3.6 star map that i spent like a loving a 3? month trying to full combo that i clutched the forget out of
What don't you get? Not many people that played the 2 star map got an SS. Therefore, you got more PP from it because you placed high in the ranks of the song.
The other beatmap apparently not many people got an S either, so you still got quite a bit of PP, but not more than the other song.
Oh also, you had a lot more mods on AND you got an SS, so of course it's going to be a stuff ton of PP. Letter grade and mods are two things that affect PP a lot.
You want the other song to give you more PP? SS it with hidden and guarantee you will get more PP. Even if you don't SS it and just get an A, if you do it with the same number of mods as the other song you might get more PP.