difference in throttle body gasket and egr spacer gasket?

I need both. I have one here at home, but I dont know which it is, so I dont know which one I need to buy. I can only find the TB gasket locally...no luck on egr spacer gasket. Can one be used for the other and vice versa? Any help greatly appreciated.
 
As long as any type of flapper does not hit being closer to an object that may cause the throttle body plate (flapper) to fully open to a WOT condition is it is hitting a wall and a fatter gasket would move it farther away is all you care about is not air flow is not gonna make that big a diff. It could, and will, but what is worse, a closed down throttle body plate or and EGR that is not flowing more air to keep you from breathing monoxide.