You are living in la la land. I don't know why this is even a debate. Shane is a favorite over Ronnie in longer races in pool, and Shane has virtually no chance against Ronnie or any top 100 professional snooker player in longer races (not single frames).
Corey winning the US snooker championship is not even a good example. That's like comparing kindergarten basketball to the NBA.
Players like Chris Melling, Daryl Peach made the switch from snooker to pool, because they weren't getting any results in snooker. So, it's not like "hey what would happen if they practice snooker everyday". As with any sport, you have to dedicate your life to it and start really really young. Otherwise you have zero chance on the professional circuit.
PS - A better debate would be who would win a fight between Superman and The Hulk.
Spot on here and I might add loads of English league players could win the US snooker thingy.