Aberdeen has been halaled. Good riddance I say. Ok, so now my question is how good were the Soviet made tanks in the hull down position?
Assuming you are talking about Second World War tanks, pretty much as good as any other tank as the point of the hull down position is to minimize the profile of the tank from the perspective of those shooting at you. I'm a bit confused by your question, to be honest. Are you asking how well most Soviet tanks' turret armor would be compared to their counterparts in other armies? Or is this a height question? Or are you asking about turret size/armor slope?
That starts to change after the war with the introduction of the IS-3. Now, despite being an unreliable, underpowered, poorly manufactured vehicle with terrible side armor, optics, and gun depression, the turret front had outstanding armor for its time. The same can be said of the turret armor of the T-54 and T-55 when they were first introduced. But the turret is generally the most heavily armored part of the tank, so that would go without saying for most countries' tanks.