They're both "fun" in different ways. The Mustang feels more like an old muscle car, and has V8 sound & power. It's faster in a straight line. The Contour on the other hand feels more nimble and refined. It's slower in a straight line, but on twisty roads it'll outrun the Mustang and feel better doing it, too.
I passed on a mildly modded '91 5.0 LX in favor of my Contour because to me it felt like an overall much better car.
