You're not comparing two similar expeditions.

We can show you the numbers, but we'd be doing you a disservice if we didn't say this first: Mentok Kangri II Peak Expedition and Twin Peak (KY2 + Dzo Jongo East) Expedition are not alternatives — they are different sports. One is a 12-day summit expedition reaching 20,505ft, the other is a 14-day summit expedition reaching 20,500ft. If you're choosing between these two, one of them likely isn't an option for you yet.