Various friends who travel to Mongolia for birds and general nature tell that local nature guides repeatedly tell to know ‘sure’ places for seeing snow leopard. They are however away from the regular bird/nature circuit.
I would potentially visit it, because a) it is summer site, so not cold b) far bigger diversity of other mammals and birds than Ladakh c) low mountains so easier to move around. However, snow leopard researchers in Mongolia answered that cats in their particular study area are difficult to see.
So: any information on seeing or trying to see and failing snow leopards in Mongolia would be welcome!