Klaus486 is on it. BTB's are 35" scale and have wider necks, as well as larger bodies.
Two different lines to appeal to two different types of player.
All the best,
ESP Ltd B-1005, ESP Ltd Surveyor-4, Squier VM Fretless P, Squire Affinity Jazz V Fretless (in work), Fender MP Jaguar, Squier VM Jazz V, Mesa Walkabout Scout