Good review Kweassa, I agree 100%. A couple of additional comments:
6DOF: As you may know, there are many community-made mods (sounds, aircraft, maps, feature improvements, etc) available for IL2. The online standard mod pack includes 6DOF. Many online servers have the mod pack as a requirement. I agree that the IL2 plain vanilla view system is very limited compared to the view system in AH2, which imho is the best in the market.
Gunnery/damage model: AH2's damage model is simplified - each structure has a hit point limit. When the limit is exceeded, the structure fails. Up until that the structure works like new. In IL2 you have various stages of incremental damage. One machine gun bullet hit may cause your wing to drag, which in most cases forces you to disengage. In IL2, the different types on ammunition in your ammo-belt make a big difference. In my opinion, the gunnery/damage model is far superior in IL2.
Multiplayer coop: IL2's strength are the multiplayer coop missions, specifically online campaigns. Our squad has been flying these types of events for about 4 years now, 1-3 times a week, every week. We average about 20 players each time. Out of the box, 32 players are supported, in addition to an unlimited amount of AI planes/vehicles (only limited by cpu power, really). With the mod, 64 live players in a coop are supported, in addition to the AI's. "Dogfight" servers, without AI planes/vehicles, support 128 players out of the box. If you want a dogfight style server, in most cases AH still wins that battle. But with a good group of friends and squaddies, the IL2 online campaigns give the best online simming experiences I've ever had. Possibly with the exception of the best AH scenarios. But we dont get to play those every week.

Camo