I believe yamaha built the engines for the mr2 and the celica gts. The gt had a motor that had more low end grunt, but wheezed at high rpm, the gts was opposite.
You would be correct on all points.
The GTS engine was a pig until you wound it up to about 7 grand. Kinda like a 4 bbl cleveland with a single plane intake and 2:73 gears.
When they first come out with that engine in 2000 we had a salesman take one out and "demo" it. Demo being the key word. He attempted a 5-4 downshift and found second instead. It wound up so tight that the clutch, bottom end and input shaft all exploded. It was a hella mess. Toyota rep figured it was spinning in excess of 16k.
