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: Charang La Pass Expedition and Ranglana Peak Expedition are not alternatives — they are different sports. One is a 7-day high pass traverse reaching 17,198ft, the other is a 18-day summit expedition reaching 18,222ft. If you're choosing between these two, one of them likely isn't an option for you yet.