Someone's crunched the numbers on this and the odds are weirdly similar. But the comparison doesn't really work, given golfers don't always aim for the pin and snooker players would rather get say a 145 break so they keep it going and win the frame.
9-darter
-players have contested 69,888 legs across 60 Players Championship events and achieved perfection 48 times, we can say that the odds of a nine-darter being completed in any particular leg are 1,456 to 1, or 2,912 to 1 per player attempt.
147
-33 since the beginning of the 2022 World Championship, divide by the number of frames played (more than 46,000) and arrive at a probability of 2,825 to 1 per player attempt,
Hole in one
-"the odds of a pro holing out from 200 yards are about 2700 to 1", based on analysis of data from the PGA Tour's ShotLink database.
https://www.pdc.tv/news/2024/12/04/stats-analysis-nine-darter-147-break-or-hole-one-whats-harder