I have a like-new brake booster I pulled from a non-ABS car, which I would like to put into my ABS car. According to autozone and NAPA, there are two different parts for the two systems. I was wondering if there was any real difference between the two, or if it's just one of those things Nissan does to confuse us. Thanks for any input.

 

from the FSM (1994), it says there is one model for the VE with ABS and another model for the rest (VG with or without ABS and VE w/o ABS)

M195T for VG and VE w/o ABS
diaphragm diameter
primary = 205mm (8.07")
secondary = 180mm (7.09")

M215T for VE w/ ABS
diaphragm diameter
primary = 230mm (9.06")
secondary = 205mm (8.07")