hmm..from what ive read f4 and g2 should climb better than g6.
Anyway im nīt 109 expert but...
109f4 has thinner armorplates, less weight and is the most maneuverable of them. Climb is excellent even compared to late war planes. Many LW aces considered 109f4 as the best dogfighter of 109 series.
109g2 better engine. excellent climb, not quite as maneuverable as 109f, but faster.
109g6 more armor. Climb and manuverabilty has suffered a little. Climb is still very good though.
109g10 late war 109. Very powerful engine in small and aerodynamic airframe. Maneuverability is quite poor compared to early 109s but it has awesome speed and climb.
For those who know better...correct me if im wrong.
Here are my rules of thumb for 109:
-Climb in shallow angle for maximal efficiency.
-Alt is 109s best friend
-Be careful in dives. Its better not to exceed 450mph, but if you do you can control plane with trims.
-Get close and personal. "Spray&pray" does not work.
-Its quite easy to keep your E advantage in 109 so use it. I dont personally like mixing up with cons(bad for SA). So i stick to easy vertical maneuvers and keep my E advantage. Used this way 109 is one of safest planes around. Enemy hardly ever gets opportunity to shoot back so you can control the fight at your will.
OK. as i said im not expert in 109, but i hope this helps even a little.