Board Thread:General Discussion/@comment-68.51.177.21-20130330030447/@comment-67.233.243.121-20130414004209

Worse is a relative term. Vilgax, it seems, would oppressively rule the universe, given the opportunity to do so. Malware wanted to destroy the Galvan homeworld, and also had a strong hatred of Ben and his Omnitrix. What he would have done after that is unclear.

To judge the greater threat, I would probably have to say Vilgax. Malware was stopped in the process of destroying/corrupting/conquering a planet, while Vilgax is known to have had success in that area.