$500 vs $1800 wouldn't leave me much of a choice. Dangerously close to what I paid for my bike. The Morgo kit used to be aluminum cylinder with fins shaped like the head, is that still the case ? MAP used to be cast iron cylinder that looked like stock. I assume it's solid gold now with a nikasil liner so you don't end up with a oil filter clogged with gold dust.
I've heard of cast iron Morgo barrels, but not aluminium.