I am relatively new as well but got into this intensely. Type A I believe is what Mr Ms tag was
Anyway, when I first started I went with the highest nic which had major TH.
I have sinced dropped down to 18 and the TH is down plus I get more flavor
rather than nic flavor.
The way my noobness understands the carts the WoW carts produce more vapor than a cool cart.
So a WOW with less nic may just get you where you want to be.