Yeah apparently its only the 02 5 speed se-r and possibly 02 spec v axles that use the same outer joint spline as the b13 axles. So far they have held up but im going with the larger just to be sure.
The driver side axle doesnt matter what year you get it from, it has the same sub shaft splines as the b13 so you can swap inner or outer joints but that isnt the main drive axle so no worries about breaking the driver side axle.