what is the difference between "Curry Powder" and "Curry Masala"?
Absolutely nothing HS. I'm just using the term "curry masala" to mean "home made" masala (a.k.a. "spice mix", "mix powder", etc) and the term "curry powder" to mean a commercially bought masala.
Some BIRs add commercial curry powder to their "spice mix"/"mix powder". I don't. I've chosen to add it separately to the main dish.
However, having said that, my personal inclination is to do away with using commercially produced curry powder altogether. But BIRs do use it.....
Hope that makes sense! And sorry for the confusion!