From totally scientific facts and research I conclude that
1) Prime Vandal gives aimbot
2) recon phantom gives better spray control and aim.
Aimbot Vandals:
Aimbot Phantoms:
Honorable Mentions:
BlastX Phantom
Singularity Phantom
Elderflame Vandal
Forsaken Vandal
Oni Phantom
Champions Vandal
Edit: I numbered them now, but the HM's are just in any order
I think that Prime vandal actually has aimbot lol, anyways, skins don't really improve gameplay, it's all placebo effect.
source: https://eloking.com/blog/do-skins-affect-gameplay-valorant