I have owned both. My verdict is that the Evo4 is a GREAT car for Stock racing and maybe 19 Turn. The drivetrain is really efficient but its not as good as the 415 in Modified. The problem wasn't really with torque steer I didn't think, more just its consistency over the run. With mod speed, the Evo would perform a little different from lap to lap.
They did a comparison between the both a while ago. Evo4 would cut SLIGHTLY quicker best lap times, but over the run the 415 was the faster car, also easier to drive.
I had great results with the Evo4 in stock, certainly a great car for that! I tried it in Modified and it was a handful, so I got a 415.