I would go with the Comp 1800 only if i needed the higher DIN.
Perhaps someone else could answer your question about the Comp 1800. I don't know the answer to that question as i was never interested in that binding.
I just hope that your question is not the result of some threads about the quality of these bindings
. No pre release or anything. In fact they released when i needed.
Did you know that the front of the piston control interface is higher than the rear?
plate height front: 16 mm
plate height rear: 14 mm
It is good to know if you're playing with the delta angle.