The BRZ was actually something I was looking at before I got my Z. Styling wise I think its a close call but I prefer the Z, although I havent seen the BRZ in person.
Subaru BRZ vs Nissan 370Z vs Mazda MX-5 - Autocar.co.uk
Here are a couple of videos too if you are interested. One is it BRZ vs Mustang which is kinda intersting.
http://www.youtube.com/watch?v=tPoZ1...layer_embedded
http://www.youtube.com/watch?v=pD3hg...ayer_embedded#!