Because neither is privacy friendly and open country. It's just amount of money and effort Russia puts into blocking VPNs, proxies and encrypted communication is well beyond China. If you travel to China bypassing all the censorship is super straightforward.

In Russia whatever worked month ago will likely not work now. By this time all the wireless mobile internet in Russia is mostly whitelist-only when it works at all. And they start to test whitelists on broadband internet now.

And Iran is likely shut off internet for good until reginme collapses.