WDW probably would have been distinct from DL as well, had Walt lived to see it completed.
Epcot would’ve been the focus (the Progress City Epcot, not today’s EPCOT park), coupled with an industrial park, and the theme park would’ve been mostly a way to provide jobs and entertainment to Epcot residents. Walt didn’t focus a whole lot on the theme park when WDW was in its earliest phase of development, but I think it’s safe to say he would’ve ensured it was different from DL. Roy played it safe and based it off DL.