It's good that there is an obvious difference.
The barrack heli have a range of 4/5 (with all research done, without munition); so with munition a maximum of 5/6 (we don't know if it was even equipped in the video).
Meanwhile, the TT heli used (presumably AH-64 Apache) have a range of 7.
Therefore, there should definitely be a visible difference, otherwise something would be wrong.