This table shows, in my opionion, one of the main problems of the new premium tanks: They are better than the standard version.
On the old days they were a bit worse than the standard ones but you got more money and crew xp.
Wargaming still claim that the premium ones are considered to be a bit worse than the standard. I think they wrote in the description of the update for the IS-3A or I heard it in a recent video of them.
Anyhow you can clearly see that this is not the case for this and some other new, mainly T8 premium tanks. The standard one is better at some stats but not a lot better and just for not so important ones hull traverse speed and gun angles just 1 addition ° for down and up in comparisson to the 41D.
Just the old "bad" premium tanks stay as bad as they were. Like the Pz IV/V (or was it V/IV?) witht the short 7,5 gun as a Tier6. Hard to do anything with that one, especially agains T8s.
I would like to see weaker premium tanks or Buff the old ones to be more competetive after all the new tanks which were introduced.