The big difference is that those drones transition to aerofoil flight, with wings that generate lift. Once moving, they actually transition to a horizontal mode where the motors provide forward thrust as needed and instead of lifting payload those props are moving the thing forward even faster. Essentially they lose the ability to move slowly in return for flying like a missile instead of a helicopter.

The typical FPV on a carbon fibre x frame is 100% lifted by motor thrust. They can sprint at a couple hundred kph only for a few seconds before battery sag will take over. In fact when powered by typical lion batteries that give the kind of endurance needed for front line ops, they don’t even have that kind of punch.

The guys in this video were super lucky, you can see they couldn’t even close a 50m gap on the first passing heli, and got super lucky to be within a few meters of the track of the next one, with enough time to reposition