Not much call for avionics on a line station these days. The B1 has so many 'privilages' with regard to certifying what were tradionally 'avionics' or 'radio' that the B2 is now focused on base maintenance or on the line at a main base.
If you fancy the opportunity to work far and wide then B1 is, in my experience, the way to go.
However, there will always be the need for good B2s in the hangars so the choice is yours.
Good luck.
