Here is a list with some of the differences. http://www.tonystrains.com/productcompare/dcccomparison.htm
1) current is 2 amps vs. 5 amps. 2) 2 cabs (4 cabs with NCE PowerCab System Power Panel $19.99) and 3 cabs more with smart booster. vs. the 63 cabs of PowerPro. 3) MU capabilities = 136 vs 506. 4) you unplug the PowerCab, everything stops (brain in controller of Power Cab), but not so with ProCab. 5) about $300 [ March 01, 2006, 07:25 PM: Message edited by: Kozmo ]