I've never heard of promite, I have tried both vegemite and marmite and I can't say I'll be in a hurry to do so again.Vegemite all the way .
Have you tried promite ?
It's one of them things, you either love it or hate it.
I shared a flat with some Kiwi's some years ago and they almost lived on the stuff, one guy used to put it on his baked potato's