What? I´m always glad if I see Soviet opponents on the loading screen. Seeing Brits on the loading screen makes me feel frustrated and prepared for an unfun game. Brits are by far stronger than poor Soviets.
Vickers > Maxim
Tommies > Conscripts
Cromwells > T-34/76s
Comets > doctrinal T-34/85s
To only mention a few important units. Add to that the worst vet bonuses in the game coming for Soviet units and some of the most gimmicky abilities and vet bonuses coming for the Brits (grenade on tanks, Phosphorus rounds, tank commander, Blitz without vet) and Soviets are the clear loser.
ISU, IS, KV8, Shocks, Guards, T70, Katy, Cons (Tommies are stronger but I would not call them better), SU85.