Mir wrote:Anywhere I can find about those differences?
The internet is your friend
The most obvious difference between the two tanks (T-54/55) is the dome shaped ventilator on top of the T-54's turret. They are on all the different variants of the T-54 regardless of the shape of the turret. The rotating floor was first introduced in the T-54B variant.
https://en.wikipedia.org/wiki/T-54/T-55_operators_and_variants
I was hoping for literature, but thanks anyway.