Better late than never? LOL! I am learning the course on acoustics, I finally got past these two songs. I listen to a lot of blues to try to internalize how it should sound when I'm trying to play, and I'll say that to me, it's because the music originated on boxy old cheap steel string acoustics. I think there is a grunt and thump to an acoustic body that you get from the bass strings that is just more suited to traditional blues. I especially like my all solid mahogany short scale for practice. It's got a rawness that works great for the BBG tunes, and I'm sure when I get to BGU it will sound even better.
I love the sound of electrics too, it's just different.