Originally Posted by Scott Fisher

I will give you my opinion which differs from Craig's. I have a lot time with a spool and now a diff. The diff gives me more on-power steering than the spool did and I have not noticed less stability under braking. On a tight technical track the diff has an advantage. Before I tested a diff I would have agreed with Craig regarding the flowing track, but I am faster on every track so far running a diff. Maybe with more setup work I could get the spool to go even better, but so far the diff is the winner in this contest. The stopwatch doesn't lie.