Tbh, this would be a pretty close call, as both are pretty equal strength wise, but I would probably say Dio would win. Garnet might be able to see every possible outcome, but she doesn’t have anything that could combat Dio’s ability to stop time. Not to mention she isn’t a Stand User, so she can’t see/hurt The World, plus The World has been shown to be much faster as it was on par with Star Platinum who can punch at the speed of light