no its not the same. the motor is different (and junk in the xxl)and longer chassis/rails/driveshafts, and with different output gears in the tranny.
that right there makes it different.
here in the states the xxl is junk i've seen the problems with them first hand and nothing you say will change my mind. i know 2 local shops that won't even work on them anymore and 1 of them sells the xxl.
might be different where you are but not here.