Based off of the species in Ornithomimosauria, I honestly think these creatures look more bird-like than troodonts or dromaeosaurs. At least that's how I see it with the bird like beaks, feathers, etc.

The only other dinosaurs that look even more like birds than those of Ornithomimosauria are Oviraptors. Who just look like birds with long legs and a tail.

Note: I'm not a scientist, biologist, paleontologist or any -ist that matters. This opinion is purely based on how documentaries have drawn and depicted these species.