and i've seen many a big table 9 ball players get their rear ends handed to them playing 8 ball on the barbox. not because it was easier for the "lesser" player, but because they weren't any good at it. navigating that barbox and running out consistenly on it playing 8 ball is high level play.
i'd much rather play a big table 9 ball player 8 ball on the barbox than the 68 yr old guy i've known my whole pool life. he gets out or he buries your ass. the 9 ball guy gets out or he leaves you a wide open rack. he's smarter than they are and he has sharpened his BB 8 ball skills to the point, i'd put him up against anyone at that game.
the point is, they are different games with different mindsets. to me, 9 ball on the big table is the easiest game there is. no balls to get in your way and a GPS to guide you from ball to ball. BB 8 ball, you have to know how to read the map. big table 9 ballers usually hold the map upside down.