Il-2 is the LAST thing I'd use to make a sound comparison. Not only do AH's stock built-in sounds blow Il-2's away, but at least with AH you can replace the ones you still find substandard.
Do a search for soundpacks, as I'm sure there's already one here somewhere that addresses your needs. Or just find a sound you want to use, name it appropriately and drop it in the Aces High\Sounds folders.