We have a couple of SRT 4s Autocrossing. They are in the same class as the Crossfire (DS). I'm beating them.... But not by much, and I think if they stiffen up the spings, sway bars and shocks it may just run right with the Crossfire. But if you do the same mods to the Crossfire then it's back to advantage.... Crossfire.
But in a nutshell... The SRT 4 is quite a little car. Very impressive.