Lite version with minimum of additional sounds, textures ect. to keep file size low

The conclusions from this are:

most "balanced" pairs

T-34/76 and PzIVF2 - each one can kill the other without problems, from about 1200m.

T-34/85 and PzIVH - each one can kill the other without problems too.

IS-2 and Tiger - each one can kill the other over 1000m, the IS is little harder to kill for the Tiger (has to hit the turret close to the gun) but it's reload time is slow on the other hand.

other:

IS-2 and Panther - at longer range (>600m) Panther has the advantage - IS has to hit the turret and is slow reloading. At close range - each can kill the other with first shot.

T-34/85 and Panther - only on close range <500 and the Panther has advantage (T-34 has to aim for turret and it's not sure kill). Can be matching each other in a city (close ranges only).

T-34/85 and Tiger - again only on close range, T-34/85 has to aim for hull and have a good angle to kill the Tiger. Can be problem if the Tiger sit's with his hull at angle (blocking a street for example) and there is no other way to flank it and attack it from another side. Use a Panther on such map, it can be killed regardles of angle with close turret hit.

Single Tiger or Panther can be very unbalancing against 76mm. Use PzIVs or if you need a Tiger, offset it with very limited respawn (if they manage to kill it, it shouldn't just return from respawn) and with much greater number of T-34/76 on red side. Same for long range maps and T-34/85s.

Very unbalanced pairs:

Tiger or Panther against T-34/76 or KV-1 - from obvious reasons
KV-1 against PzIIIL - KV can be killed with APCR ammo only
T-34/76 against PzIVF1 - T-34 can be killed only from very close turret front or rear hits
KV-1 against PzIVF1 - German tank simply can't touch the KV without HEAT ammo...

Want to do a map hard for Germans and actually realistic? Give them StugIIIs and PzIVHs, and for Russians lot of T-34/85 and a few IS-2s... :-P
Similar can be T-34/76 and a few KV-1s for Russians and PzIIILs with PzIVF1s for Germans. Good luck with Barbarossa ;-)
So any team "balance" is just up to map makers :-)