Ok.. not really a battle but really cool two libraries for guitar.
Which one did you like?

 

I think if you want convincing guitar parts......you should buy a guitar and learn to play it.
Now then.....before the hater's start hating, let me say that MIDI guitar is also no substitute
for convincing piano parts. In that case, guitar players should get a keyboard and learn
to play it. All that being said, keyboard is much easier to learn than guitar IMHO.

But hey....that's just my opinion.