Yeah, I have DCS+P51, and am trying it out now. It looks like DCS is taking pointers from A2A, and the manual's much the same.
What I can say is that DCS is very good and IL2 good (especially for 10+yrs).
I'm a bit skeptical about the DCS P51 stall characteristics, but maybe I'm wrong as I don't own or fly a real one.
Is the DCS stall characteristics better or worse than that of IL-2? Just curious, cuz I don't own one.