I assume that all gaskets technically should have an identical shape, but I'm pretty sure that this can vary, depending on manufacturer, quality etc. So the question is if I can use any intake gasket to gasket match my heads and intake, or if I need to use the set I'm going to put in the engine.

I'm sure it's safer to use the gaskets that I eventually will put in there, but I haven't decided on the rest of the parts for the engine and I don't want to order just the gaskets if I can avoid it.