Different 109s for different purposes.... If you want to do tight, tiny, turns take the F4 or G2 (but, really, the F4), and if you want to stay fast enough and climb fast enough to compete with all those late war runners, take the G14 or K4.
G14 and K4 turn worse, but have the E regeneration you need for a fully flexible sortie, to adapt to any kind of target you may find. The 30mm lends to a different fighting style as well, but allows you to hit any random bombers you see.
F4 turns better, still capable enough to dogfight against larger numbers and come out on top, but the firepower is really more of a "kill one target at a time" type of engagement, and not as suitable for random bombers. You have to fight the turn fight in this plane, because it really isn't fast enough to keep up with the late war LWA monsters.
Both are great in their own right. Take either. Take both. Mix and match to meet your mood.
Let me tell you the real secret here, folks: You don't have to pick just one!