The first question I would ask is does that gentleman's cartridge vaporizer or combust dry herb? I'm going to guess the later.
Aphex91, I assume you looking for a portable that does both herb and oils?
The benefits are getting a vaporizer that does exactly what it's supposed to do. When you have a mutli purpose vape, it usually does one thing very well and the other not so well. Or just does a half-ass job all the way around. People are always trying to get a hybrid vape that does both dry herb and oils and I think they sell themselves short when they do that.
If you are going to use both, get yourself a good vape for oil and find another good vape for herb. If you have an O-phos and have been looking at eGo-Cs, then I don't think a setup like the Persei with the Bender is for you. It's a monster compared to the smaller vapes you have but it's probably the best multiple purpose "portable" vape set-up. It just doesn't fit very well in your pocket.
I see that you own a Vaporbrothers already, the Magic Flight compliments that nicely for herb. For oils, you can't beat UP Tech. they are in a league of their own.