It sounds like they're tracked well, but how good they sound relative to the rest of the instruments is going to be the key. Kind of hard to tell just having guitar samples.
At best, record with both at the same time and blend as/where needed.

If I had to guess though, I'd say the 57 will do you better for that style and tone.

Good luck.

First of all, I'm biased as I'm partial to the 421 as opposed to the 57. I have to admit the 57 sounds "right". I can't help but think it would be easier to get the 421 into the mix though, once you lay down bass and drum tracks. Just my biased, opinion though.

Thanks for the input, yes for the past year after reading various sites and posts on this forum I'm a total fan of mic positioning (Duh, I know :) ) but with the current rig (tube gear and a Iso cab) and situation I'm in (Living in an apartment) I was hoping to come close to achieveing a good quality tracking setup for electric guitars.

Here is a rough mix of the song I'm recording with the guitars and the 421 mic, on the guitar I used the 1176 plugin limiter, 3 band eq (3db @ 100hz, -2db @500hz, and 3db @3khz), and a Plate verb using D-verb. after listening i might just roll off the high end a bit or reduce the track levels,
http://soundclick.com/share?songid=6511747

But this is still a work in progress and once I'm done I'll post it in the Critique forum.