Il2 has come a long way since the demo and was light years ahead of anything else at that time.
I don't recall the flight sim you are talking about but I started on my Commodore 64 with original combat flight simulator for MSFS. You know, the one that had the screen refresh after about every second or so
I think I must have bought just about every single combat flight sim since then.
Secret Weapons of the Luftwaffe was great for 1990!
There were just so many that I had a great time with.
Since Il2 was introduced I have enjoyed this one by far the most.