Actually the have similar health and require the same number of shot from standard AT weapons Dozer even gets more health. Brumbar 800 Dozer 720 and 880 at vet 2.
The rotation is not about balance is about scaling. Many units have only be balanced at vet 0 and scale better or worse than others.
Issue with the brumbar is the vet armour AND health with ability for free bombard and easy wipe vs AT gun, this combined with magic panzer smoke means it has a bit too much survivability that leads reversing out with 10% health where Dozer is a ball of flame. Rotation means very little when both units are used to frontally drive up and wipe team weapons or blobs. They are not m10's...
You talk of radio net stacking but brumbar + command P4 stacking is far more cancer, I mean how many times do you see vet 3 dozer with radio net compared to brumbar with command p4? The former I have never seen and the latter I see in almost every teamgame.
Next you will be comparing comet to panther, comet must be better due to better rotation speed right?