China = tropical, subtropical, cold desert, alpine, extreme alpine, alpine that tickles god's nuts, temperate, maritime, steppe, taiga, cloud forest, rain forest, tower karst. China has enormous river gorges the US lacks (the Columbia River Gorge is big, but not like some of the Chinese gorges).
USA = tropical, sub-tropical, hot desert, cold desert, thorn scrub, alpine, extreme alpine, temperate, steppe, taiga, tundra, maritime, cloud forest, rain forest. The US has the Colorado Plateau canyonlands. I don't know if China has anything similar.
I think the US might have China beat with tundra, hot desert, and thorn scrub while China has tower karst and the big gorges.
Russia has temperate, alpine, extreme alpine, steppe, more steppe, taiga, maritime, cold desert, tundra. It lacks tropical and sub-tropical. Overall, I think Russia has less diversity of landscape than the US or China.
