Just based on results. I also like live play better, but I think just about everyone does.
But I believe some people are better live, some are better online (maybe its their play style)
For instance, Major Nelson, DR-Ell-Supreme and KARAISKAKIS , among others, are much better online than live.
On the other hands players like me, Henry Domerkant and Garulfo are better live.
Please don't judge my level at live as I rarely get the chance to play, while I play online all the time. All I need is some practice and you'll realise I am about as good as at online, there is no significant reason for my level at live tournaments to vary from online ones.