going to make baked sponge cake recipes say rice flour but do they mean reg rf or the sweet(glutinous) rice flour. thanks?

I would guess the recipe for your sponge cake calls for plain rice flour. If the recipe meant glutinous sweet rice flour it would say so.

Rice flour is ground from long- or medium-grain rice, the same kind of rice that most of us probably have in our pantries. It has some thickening properties, but is better used in gluten-free flour mixes for baked goods.

Sweet rice flour is ground from short-grain glutinous rice, aka "sticky rice." Don't worry, though; the fact that it's called glutinous rice does not mean that it contains gluten. Rather, this rice has a much higher starch content than other kinds of rice, making it an extremely efficient thickening agent for sauces or binder for things like mochi and noodles.