have laid into a T34 with 50+ rounds from a manned ack before and did zip.
Easier to kill a Tiger in a manned gun than a T34, which seems a bit "off" to me.
With all due respect, I believe you're working from too small a sample size. The T34 is still incredibly vulnerable to the manned gun. I drive the T34 a lot, and I have driven onto many a base with both models of it, many times, and I can assure you that on average it only takes probably 5 to 10 rounds from the manned gun not only to take a T34's turret, but to kill it outright. The T34s, either model, are at least one order of magnitude easier to kill from a manned gun than the Tiger.
And don't get me started on the T34/85's turret. It's made of paper mache. I've looked up the numbers for the thickness of armor on the T34/85 turret, and I just can't see how that is justified. Almost anytime any gun in the game hits that turret, from any sane range, it's gone.