MiG-3 was built as a high-alt fighter/interceptor. But that means extra weight in supercharger or supercharger optimized for high alt not below.
Flown carefully the MiG-3 we have is an early-war Russian speed star but don't get slow and think you're going to turn hard.
OTOH compared to the 109F, it is lesser overall.
What did Pokrishkin(sp?) say about the early LaGG's? Yak-1 is light stick but barely armed and ammo'ed and gasping above low alt.
If you haven't seen Wings of Russia then find this series on Youtube and think about getting the full-definition DVD set: