what the best airplane or tank in berlin map
For Axis - a pay-to-win Jagdpanther, for Soviets - IS-2 or SU-100, but they are only slightly better than T-34-85.
As of planes I dont know that.
ahh pay to win
IS-2 is complete trash.
SU-100 is without MG or turret and has small number of shells. I really don’t know why you think it’s better than T-34.
JP isn’t definitely better than tiger or tiger II. It’s not as versatile. And since it’s based on panther, it has extremely bad reverse speed. 
IS-2 is not bad with properly trained crew.
SU-100 is the only Soviet tank in Berlin equipped with smokes, which is very useful on some maps.
tank: tiger 2
plane: fw 190 d12
tank is obv, plane: hard to fly but once you learn to control it, it has insane cannons and good bombs on top of it. its an attacker plane that has better fighting stats than most fighter planes in the game!
Is-2 can be situationally hilarious in maps like the opera house assault 1st point, where you can kill 15 people / shot.
The 122mm is not a joke… except when a pz iv just takes the aphe in hull center for no damage at 50m.
Planes:
Ussr: il-2m or whatever that is, not the 37mm one.
Germany: fw-attacker. I recommend this for a gold order, you can also fly it relatively early.
I can do exactly the same with short barreled PZ IV in Moscow. But the difference is I do reload in few seca instead of minute, lol.