Originally Posted by Lisnaholic

"Blues" is the word for the whole genre. Sometimes people want to distinguish between early material, which was often one guy with an acoustic guitar and later stuff which highlights the elec guitar, plus band, so they call that "electric blues." Early acoustic stuff is also called Delta Blues because that's where it came from, while Elec Blues started a couple of decades later, in Detroit or Chicago I think.

Of course many artists do a bit of both: perhaps your BBKing album was his first try-out with an elec guitar and that's the reason for the album title. Psy-Fi would know!