>>715539941World has
-Better core gameplay. Seriously, I went back to play 8DX and it feels like controlling a brick by comparison
-Better tracks that allow you to do a shitload of cool tricks
-Costumes for the characters
-Better soundtrack, tho 8 is really good too
-A ton of P-Switch challenges that really test your skill
-And the cherry on top: Knockout Tour probably the most fun mode in MK ever
The only thing 8 has over World is the battle mode and 200cc, and even then, World has a better battle mode than vanilla 8 and 200cc was an update that will surely come to World too.