Just about the opposite as Space.
DL has one track, so the cars are two across, while WDW has two tracks, single file cars.
Splash at WDW is two across, DL is one across and if I remember correctly you can fit two people in the front seat (not side by side, do the math)....the Matterhorn bobsleds 10 years ago was similar when all it had was a fabric seatbelt to keep you in. I think it's been almost 4 yrs since I rode Splash.