Comparing AH models to IL2 models and saying IL2 is clearly better is false.
Look at the original IL2 models. Boxy, flat, uninteresting, often poorly shaped with low poly counts (did you even LOOK at the gun troughs on the 109 cowling??) Even on maxed graphics they were stick-figure planes outside a certain range, then when they got into range they "popped" into 3D.
I was seriously UNimpressed by the state of IL2 graphics, straight from the box. Compare THOSE original graphics to the original Ah graphics, and they're a toss-up. AH more crisper, clearer, IL2 a bit more detailed (wires, etc)
Folks like to compare the latest graphics model of IL2 to the oldest graphic model of AH1. Instead they ought to compare it to the P-51s, B-25s, and so forth, of recent AH graphical updates.
Compared to THESE graphics, IL2 isn't such a clear victor anymore. They both look pretty good, only IL2 requires a monster computer to get its good looks.
I was never impressed with the "top-down only" ground in IL2. It showed up one way as a low-res model than "popped" into view as something else. You could see the break where the detail level shifted, and rivers didn't line up or anything. When you got below 5000 feet it started looking bad, and on the deck it's pure crap. You're looking at a texture of something that's supposed to be far away, only you're right next to it, and the illusion totally fails. AH1/AH2 terrain has always been better. Lately, I dislike the broken horizon AH2 has, but that's only been around since the tiles recode. Once they fix it, it'll go back to looking pretty sweet.
So,
Terrain: AH win
Graphics: Compare like generations and it's a toss up
But AH requires a sh** load less of a computer to pull off the highest levels of detail.
The ONLY thing IL2 has is a super-inflated use of colored light. It's a big part of their eye candy and rendering, but I think folks misunderstand WHAT they like about it. It's not the terrain, nor the planes, but the light that is bouncing off of either! (my opinion, take it as you will)