Dirt cars Vs carpet cars?

[Derka]

I'm struggling to understand which should be best for my local club.

We run on mixed surface of carpet and wood flooring.

Would for instance a Schumacher KC or KD be better or B6 Vs B6D?

I ask as my current mid motor, laydown car is ok on carpet but pushes wide in the slippy flooring and I'm losing time in those corners, would a stand up 3 gear, dirt spec car be better here or worse?