511 or 502?

[F1END]

I'm considering upgrading my DB01 basher to a proper racing car, but I'd like to hear from people who have driven both the 502 and 511 (preferably Lee Martin )exactly what the difference in handling is (if any).

I understand the potential 'torque steer' issues, but does it actually make a noticeable difference? Is there more acceleration from the shaft drive?

I'm leaning towards the 511 mainly because of the amount of shared parts with the DB01, which I'll be keeping for bashing, but the 511 seems much harder to find right now.