Huh, wasn't aware that the WWOS bowling lanes would be for vacationers too. Two competing bowling alleys on property seems... odd. I'm a Walter Sobchak-level bowler here but I didn't see that demand coming.
As far as I was aware (and I may be wrong), I thought that the WWOS bowling lanes would be used for the professional tournaments, but when they weren't being used for the tournaments, they would be open to the public.
The difference between the two would be that Splitsville will also be a restaurant (although I would guess that there would be some sort of quick service restaurant in the WWOS complex - just like in local complexes), and that Splitsville may have an age restriction after a certain time, so parties including underage people may not be able to play at night, but then they would be able to go to the WWOS Complex.
In general, I wish that they would use ESPN WWOS more for vacationers - have a bus running from DTD to WWOS and back - they could have bowling, batting cages, olympic sized swimming pool, use of the running track, another gym, etc.