Yeah, thats the beauty of a Bearcat, its not just speed, and actually, its top speeds only around 430. The Bearcat can also out turn anything, AND hold its speed in turns better then anything.
Tigercats by far my fav, id take that over anything. But they dont call the Bearcat the "Hotrod" for nothing.
Another advantage, yet to be discussed, is that the Allies had new heavy bombers still coming out. Where as Germany and Japan never put much into the heavy bomber.