IL-2 Battle of Stalingrad was designed to attract WarThunder customers in a number of ways. If you like WT you'll probably also like BoS. And no, I'm not a paid shill or fanboy of BoS. In fact I don't like the Single Player version of BoS as it reminds me too much of WarThunder. But I'll bet a lot of WarThunder customers will like BoS.
You will need a twisty joystick...no mouse fly in BoS. But other than that you'll be good to go! BoS offers both online MP and offline SP game play.