All Bf109s are formiddable and interesting planes as long as they stay in the historical context.. (with possibly the exception of the Bf109G-6). Since the 'context' of the MA leans towards 1945, with all the monster planes flying around, naturally the G-10 is the preferred choice for many. Probably the only 109 which can always fly on its terms in the MA.
However, for temporary use as point defense, vulch-clearing and defending attacks from CV planes, the F-4, G-2 and the G-6 can all manage a good chance of success. (Although generally, something like the La-5FN or Spit9 can carry out those roles a lot better)
The really tough decision for flying the various versions of 109s, lies with the fact that all of them have the same qualities as a 'hybrid' style of fighter, and yet, subtly different, and each of them except the G-10 has a distinct weakness due to chaotic MA conditions.
F-4, is probably the most pleasant and forgiving dogfighter of them all. Against planes like the Seafire or the Hurricanes, it can fight advantageously. However, flying around in an environment full of N1K2s and Spit9s, it's limitations are all too clear.
E-4 lacks too much of everything compared to the popular MA planes.
G-2, is a powerful 109 with a good balance between maneuverability and speed and climb.. however, also needs continuous attention to its surroundings. Meet something like a N1K2 or a Spit9 higher than itself, with a pilot that knows what he is doing, and the chances are slim.
G-6 has the option to carry the 30mm cannon, but that's about it. A 'moderate plane' is the best score I can give.
The G-10, is the only 109 truly powerful enough to fight against any plane in almost any situation, and leave the area alive, be it victorious or just being chased away.
Generally, in the MA, minor skirmishes or attacks from the sea, is a good time to try out the 'lesser' 109s. But in an environment with massive engagements, if you really want to survive, you'll need the G-10.
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