I'm afraid I don't know what you mean by espresso beans. Are you referring to grind, roast degree, etc? There is no such "origin" as espresso coffee. Sometimes shops label coffee as espresso, and they mean "We roasted the $hit out of this coffee and ground it super fine."
Beans that are roasted too dark, i.e. Starbucks beans, loose all hints of origin and are simply a heavy, generic flavor. While some shops call this "espresso roast", if you walk into an actual coffee establishment with real, trained baristas on hand and ask them about espresso coffee, they'll probably look at you funny. Now some reputable shops sell espresso blends. It's a custom blend of different beans that is good for making espresso. However, if you ask the shop about the particulars of the blend, I'd bet that you'll never find a blend with more then 20% sumatra. It's just too overpowering.
OK, enough rambling. I feel about my coffee like most of you feel about your gars. You have filler, binder, wrapper, humidity, etc down to a science. I'm the same with my coffee 😉