again, i'm not arguing which rifle is better, i'm saying that using the vandal helps you improve better by emphasizing crosshair placement, first bullet accuracy (by lieu of the guaranteed one-tap), and good movement options
everything the phantom is better at (recoil, accuracy while moving, fire rate) makes the user more inclined to use the phantom those ways (crouch spraying, run and gun, spamming).
your clip is a situation where the phantom is much better than the vandal. it would be much harder to get the spam kills with the vandal. however, a newer player or a lower rank wouldn't understand that's the situation where you should use the phantom's better abilities and would spray all the time, which would hamper them if they want to improve
just to set the record straight i think the phantom is actually a better rifle than the vandal