I have 'em both currently (GN2 and iPhone 5 on Verizon). I love 'em both, too... The GN2 is too big, but not quite so much that it's a deal breaker. The 5 is just what you'd expect - solid, sleek, fast, and small - in a good way. I will tell you that if the GN2 is your first real Android experience, it's probably one of the best out there right now, and probably ever.
The only thing that pisses me off about the 5 on Verizon is that it can't even do simultaneous voice and data over LTE.