You're not comparing two similar treks.

We can show you the numbers, but we'd be doing you a disservice if we didn't say this first: Gara Gushaini Trail and Markha Valley Trek are not alternatives — they are different sports. One is a 2-day trek reaching 6,500ft, the other is a 6-day trek reaching 15,518ft. If you're choosing between these two, one of them likely isn't an option for you yet.