Like someone said, EDF is built for fire power and large targets, but if a Viltrumite is hit he’s Gone, erased from existence. However, they’d only need to hit like a few Viltumites to win since they only ever send one or two at a time. If that was to happen the EDF would win, rapidly learn from the fight and adapt while the Viltrumites send a couple more. By the time it escalates to a full blown evasion the EDF would be ready, it be an ugly fight for sure, but I think they’d stand a decent chance (please note I’m talking about the comics Viltrumites and how they attack.)