To the OP, the only time Mesa Boogie used those guitar like cabs, which were modified for bass, was a 4x12 in the early 80’s that I am aware. Otherwise the tall 4x12 you saw on the current Boogie site is there current offering.
I'm pretty sure he meant narrower, as in not as wide.
Mike
That probaly IS what he meant, but I figured I would point out the obvious difference in internal volume between the cabs (as should be expected with bass & guitar cabs).
__________________
Life is good as a "Bottom End" dweller
Mesa Boogie Club #92 / Big Cabs Club #37