There are eight tier VI heavy tanks in WOT (patch 9.14):
- KV-2
- KV-85
- T-150
- VK 36.01 (H)
- M6
- ARL 44
- Churchill VII
- O-I
I have already stated that the T-150 is the best tier VI heavy. It was a tough decision, but it is very easy to single out the worst tier VI heavy. It is actually the one with best frontal armor and highest DPM. You might ask why, but it is down to two factors: Penetration and speed. And the winner (loser) is the Churchill. The VK 36.01 (H) has even worse penetration, but it has got the speed to cope with it, either to escape from a highly armored tier VIII or flank and get around. The Churchill is to slow to do any of those things.