^^^

That's like saying a Corolla and a Corolla GTS are not both Corolla's... both of them have the "Corolla" name, but the GTS was RWD with the 4age (on the AE86 platform) and the 4-doors were on the AE82 platform with a different engine, different body, and different drive (FWD, not RWD)...

IMO the Matrix and the Corolla are closer together than when Toyota had the Corolla and the Corolla GTS in the lineup...

Heck, if you want to be super-picky you could roll Pontiac Vibe and Chevy Prizm sales into the Corolla/Matrix group as well...