sm57 vs sm7 (clips)

Don't know if you could.. but are you able to do a comparison of these on clean vocals? I'm looking into getting an SM7 but I mostly do cleans. I love the vocals on the latest Paramore which I think were done with an SM7, but a comparison with something I've already got (57) would be awesome.

if i remember correctly in the studio video blogs, the new attack attack singing/clean vocals were with a SM7b.
(maybe it was just the pre pro)

can we get Joey in here to confirm?

Edit: sorry didnt mean to bump a 3 month old thread, but im curious about the sm7 for clean vox as well.