Compare in what way?
It is the same platform as the Trailblazer, Envoy and Buick Rainier (and Isuzu Ascender).
Physically, it looks more or less like them, but has some Oldsmobile styling.
It was the "high-end" GMT-360 platform. But now with the demise of Oldsmobile, the Buick model will take over that position.
The Rendezvous is a smaller truck than the Bravada and Rainier.