Not exactly. EVs are better the slower they go. ICE cars reach a speed low enough energy use per mile increases. Around 45 to 40 mph is good, go slower and mileage goes down.
OTOH, ICE cars can increase the mileage they get by at least 200% with proper driving techniques. However, I don't think people want that. It would make for some crazy traffic.
A none trivial Part of that is because they have a transmission and can get in the right gear and rpm to maximize efficiency. That's why cars now have so many more gears than older cars.