Polar Bear
Feeling the Heat
I have no idea as to what the differences are, you could ask ESW.
I also have a corner install but have no 45 degree piece of vent involved at all, the tee handles the turn to the side as well as going up. I also am not locked into any positioning limits that might be imposed by the venting locking system.
I just fall under the generic 15 EVL for 3" vent.
X2