Quasar,
I think Vermillion hit it on the head. The La-5FN was an energy fighter, much like the Ki-84 in WB. The La-5FN's successor, the La-7, would quite probably be more of the same.
Soviet aircraft were always more maneuverable than the LW fighters in the horizontal plane. What the Soviets spend most of their time developing was in making their aircraft at least as maneuverable, if not more, than their German counterparts in the vertical plane. In 1943, the VVS came out with the La-5FN, their first fighter that was an equal to the Bf 109, and a serious contender to the Fw 190. By 1944, the VVS was coming out with aircraft that were superior to either the Bf 109G or Fw 190A, in the vertical, or the horizontal plane: La-7, Yak-3, Yak-9U. I should point out that all my references are wrt the altitude range that air combat normally occurred in the Russian front, up to about 5000m (16404ft.).
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Polk./16GIAP