I was talking to someone about this the other day, I personally am NOT a pin expert in any way shape or form, but it was explained to me that one difference, and I don't know what other differences there are if any, is how it does the stuck ball check when balls get stuck on
the playfield. Apparently, 2 balls can get stuck in the Terminators head, and with L8 there is less of a delay before it finds them and shoots them out.
Maybe someone with more knowledge on this can verify or correct what I am saying ? I am curious if this is true or not.