Snooker is a much more difficult game than pool; people who are amazing at snooker are generally very good at pool, but a good pool player, if he's never played on a snooker table, would struggle.
Capo -
When I was younger I used to hang around a local pool hall. We played mostly 8 ball, and a little 9 ball at times. There was a section of the pool hall that had about 4 snooker tables. Those tables were always occupied by the same gentlemen who were much older than most of the others playing regular pool. And those same gentleman hardly ever played anything else but snooker. I also remember some of the older guys who were very good in regular pool attempting to play snooker a few times and they did not seem to play it as well as they played regular pool.
Don Cardi
