From what I saw, the average trophy size seemed better in Kazakh.
While I was in Camp, the smallest Ibex was mid 40s, biggest was 50"(8 Ibex shot while I was there).
If you wanted it, there was definitely an opportunity to take a 50" class Ibex there without too much work looking.
From guys I know who have hunted Tajik and Krygz the average seemed much smaller, the hunts in those countries are generally tougher, so I think this may reflect the average hunters 'ability' to operate well in that tougher environment(higher altitude, more basic camps, harder weather etc). Granted there is a chance to kill a big billy everywhere, but the average gives a better view of what to expect.
If you go Kazakh, you can add on a Maral, and those are some beautiful big Elk in a cool setting.