I had a Warwick Corvette Standard Rockbass a few years ago, and it had the trademark Warwick growl. I now own a German Warwick Streamer LX which is a totally different P/U configuration and it has that same signature Warwick sound, but obviously sounds a bit better overall.
So in short, yeah I think all Warwick's growl to some extent. They have a unique sound that is kind of all their own, which is what really drew me to them in the first place. I suggest you try out a bunch of them and see which flavor of the Warwick sound you like best.