I have both the Bulldog and the PzIII (Ausf L). Both have all plastic (tracks, gears, etc). In that setup, the Bulldog is better and would be even better with a little weight in the front end and spring upgrades in the backend. The PzIII runs well, but its narrower chassis and tracks set it at a disadvantage compared to the Bulldog. However, it is more nimble and quicker on pavement and hard dirt than the Bulldog.