Is an EF5 tornado worse than a category 5 hurricane?

It depends. Hurricane ratings are based on measured wind speed, so a hurricane can become a category 5 but stay at sea, causing no damage. Tornado ratings are based on damage severity, so if a tornado is rated EF5, at least one well-built structure must have been completely obliterated. However, a hurricane that makes landfall at category 5 intensity can be expected to be much worse than most EF5 tornadoes.