Cable's gear makes me lean towards him. He packs the same kinds of things Bucky does, but overall more powerful. And he has a few things Bucky doesn't.
Physically, I don't think they are actually that far apart. Cable showed inhuman speed, toughness and strength (especially with his cyborg arm), and was decently skilled as well, though I would still give Bucky the overall edge here.
But yeah, Cable's gear, which includes
Spoiler:nets him a majority IMO.
an energy shield, as well as a gun that packs enough punch to send the Juggernaut flying
His H2H skills were pretty good IMO. Wade is just stupid fast (Because Science did calcs on the reactions required for the bullet cut feat, and it is dozens of times faster than a normal person's) and the other person he fought, Domino, had BS luck powers that made her difficult to tag.
Also, a lot of the times he fought Wade, he inflicted enough damage to seriously mess up most opponents. But Wade just kept healing and continuing to fight.