Use it as the summer car parhaps? I don't know what winter is like where you are, but if there's selt on the roads I'd try to keep the nicer car away from it as much as possible, even though the SVX has proven to be incredibly resistant to rust. (Except mine
)
According to your sig, the claret is an LS, and the other car is an LSL. LSL's are better suited to winter driving (unless the Claret has a touring package).
Anywho, I'd say make the less nice car the daily driver/winter car, and the nicer car the weekend/summer machine.