Indeed, the 19-year-old striker has been a breath of fresh air at Old Trafford and comfortably provides Manchester United's biggest individual threat at present.
And Smith feels Arsenal boss Arsene Wenger will opt with the quicker Gabriel to deal with Martial.
Smith told Sky Sports: "I like Gabriel and I think he can make a good partnership with Laurent Koscielny. He's obviously much quicker and more aggressive than Per Mertesacker.
"Against Martial it might be that Arsene Wenger prefers that little bit of pace. Gabriel does look as if he can nail down a place at Arsenal so it might be that he brings him back."
Of course, Wenger's ignorance at the moment suggests he won't have a plan at all to deal with Manchester United's current biggest threat.
Against Olympiakos, the Arsenal boss did what he always does - send his team out to play their own game without any plan, preparation or consideration of the opponent.
That may have simply been a matter of the Gunners underestimating the Greek side, something they are less likely to do against an old rival like Manchester United.
But Arsenal supporters won't be expecting all that much from Wenger considering recent events - and they certainly won't be expecting an explanation for whatever the Frenchman does decide to do. He obviously feels he doesn't owe his club's millions of fans anything.