If you want to learn tunes that you can play by yourself, then ABGU is a better course.
ABGU will teach you to play a bass line and melody simultaneously, and some solo's.
If you want to learn to play with others, BGU mostly teaches you rhythm tracks and solos for jamming.
You can use either electric or acoustic guitar for ABGU, you would need electric for most of the solos in BGU.
Either would be a good next step after BBG.