Thanks to Cobra6 for sharing.
Here is the proof:
Wargaming again promised that the camouflage values will be the same on the pre-skinned tanks as with the clean ones with an official camo pattern applied on them. Why is this promise not reflected in the game?
It might be the same with other tanks, they have worse camo than they should because of the pre-applied skin… Looking at you, M41 90 GF…