Haha, I'm aware of all this, I was just saying Toyota shouldn't have put them in the same catalog. They both are ZZE13x cars. They share the same suspension, engine, drivetrain, and a lot of other stuff as well. But, let's say you pick "2007 Corolla" in the EPC, you now get listings of bumpers, doors, wheels, interior pieces, switches, wipers, etc, etc for both the Corolla and the Matrix.
Now consider this, the 86.5-88 and 89-92 Supras have 2 different catalogs.
I haven't really had much trouble with this and finding parts or whatever, it's just an annoyance worth noting. There have been a few times parts have come back to our department because a Matrix part was ordered for a Corolla or vice versa.