I think I find 109G14 an equal match to Yak 3.
Hmm.... In certain areas maybe, such as climb on mil power maybe. Otherwise the -3 is noticeably better in speed, turn, roll, and very noticeably better in forgiveness. Th G-14 wins in versatility for sure (jabo, bomber hunter/killer, AND a fighter). Not to mention a raw firepower advantage (30mm, triple 20mm, an more ammo in the single 20mm).
I think those two planes are worlds apart, actually.