Don’t think that’s any different, but ok. Either way, it’s being used within the context to represent 2 different eras. If Gaijin wanted to be more accurate the Tech Tree flag should be half and half, the old Hinomaru and half of the present-day Hinomaru flags. While keeping the battle flag on all Interwar->WW2 air, ground and naval on the stat card.
Because Modern German Flag is quite different from WWII one? Have you ever considered that?
Whatever how different the flag is, although yeah, unlike for USSR, for Germany it would be more reasonable to have modern flag instead of censored WW2 war flag.
The best most recognizable replacement for the current censored nonsense would be an unadulterated official German flag from 1934-1945:
Modern sensibilities + russian + german law would prevent this. Even if accurate for German tanks from reserve to the mid tiers.