yes it does, the gears dont just break. they break because of the shock loading when you jamm it in gear ie: crunch it.
if it doesnt crunch it will last a long time. if it crunches then smash. end of story.
so the gears are the same. but the twin synchro is stronger because of the above reason.
ps. after doing 12 boxes in my dr30 i got used to knowing how and when the would pop. l series,fj,rb. the rb lasted the longest. all same gears