i remember reading at drccentral.com that ABS (black) has a bit more grip than the PVC (white)

I was in the same situation too between the TT01 and TB02. I chose TB02 and just ordered mine today. sure TT01 has many hop-up parts in ebay, but those parts, TB02 already has like Adjustable Camber, Adjustable Toe. plus, weight distribution is better for TB02 and TB02 has ball differentials. Plus, you can pull parts from the TB EVO series to use for the TB02.