first of all walang Galant SuperSaloon na VR4.

the term VR4 was taken from the Galant VR4 All-Wheel-Drive with a 2.0L 4G63T engine.

As for your question, mas malakas ang gas consumption ng Galant VR6 because it is equipped with the 2.0L 6A12 DOHC V6 engine compared to the Galant Super Saloon which is equipped with a 4 Cyl. 2.0L 4G63 SOHC engine.

If I were you, I'd get the VTi 96 na lang.