fin vs sm7b

[sheldzor]

The Fin | Heil Sound

vs

Shure sm7b

will mainly be used to record 'different vocals' ( as well as a little acoustic guitar, harmonica, and some electric guitar)

here are some examples of the vocal styles:
YouTube - Foxy Shazam - NO!! Don't Shoot!
https://www.youtube.com/watch?v=46DGwJ4payQ&feature=channel_video_title

 

[moresound]

I would go with the SM7b for vocals.