I guess its only Mysore which performs similarly to USA in overseas.
In Mysore though SRK and Aamir are top stars with little above Salman so star power comes into play for these 3 and also content.
Coming to Akshay, his highest is
Rustom - 6.87 cr
Jolly LLB 2 - 6.45 cr.
Baby - 5.74 cr
So now his commercil films like HF2 - 5.45 cr HF3 - 4.71 cr etc are lower than those content driven.
Similarly films there in Mysore did huge like Dear Zindagi, PINK, Neerja etc performed excellent in that circuit with all going ovre 7cr +
So according to me Mysore = USA . This was also said by BOI too.