This is an interesting poll, I think both will be great players, but as many have said already it isn't exactly a "fair" poll, and really we're all just guessing who will be better because we haven't even scratched the surface with NP and Ehlers definitely still has room to improve.
As someone who watched Ehlers all through his Q career I knew he would be awesome, he was just too skilled and too smart not to succeed, and he's shown that, but I think some of us need to pump the breaks on saying that hes better than Patrick can ever become. He is in a unique situation, so compare him to Seguin, Staal, Thornton, Lecavalier, or many other top level prospects who came into the league and didn't shine immediately, but Patrick has his own situation with injuries and ice time. No two players are exactly alike, but there is certainly precedent and absolutely no reason to believe he won't make massive strides in the coming 2-3 years like the players I named did.