I've had both. As a daily driver the Rover is much nicer. Interior is nicer too. So is the bumper. And the Vortex alloys.....!
You forgot the nice plastic 'oak', Steve .
In an ideal world, one of each would be the answer
... by which I mean R75V8, ZT 260, ZT 385/400 plus Tourer variants of 'em all of course, and on the seventh day the Lord said "useth My SV-RS".