Please no falling out between Marmite and Vegemite. Brothers (and sisters) in arms against a host of barbarians who would hold both in equal disdain.
In any case when I say Marmite, I tend to mean some cutprice own-brand clone in a supermarket anyway, which tastes just the same. I haven't yet found a clone of Vegemite yet, and the real stuff is a bit more pricy, and I'm a scrimper. (And I like the Marmity taste better, since it's what I'm used to...)