Samson AP1B - any difference to AP1?

[Stylon Pilson]

Samson do a (now discontinued) wireless system. The "guitar" version uses the AP1 receiver, the "bass" version uses the AP1B. As far as I can see, the only difference between the two is that the AP1B has an additional "shape" option on the power switch. The specs in the manual are identical for both. Most other manufacturers' wireless systems don't seem to discriminate between bass and guitar. I posit that there is no reason not to use the AP1 (ie the non-bass variant) with bass. Can anyone think of any objection to this?

S.P.