The best part of the triangle is its versatility, and its reactionary success to defences. It has variations for the intensity of any defence, and forces weaknesses in what appears to be an impenetrable, tight pressured D.
It also adds more versatility for an inside~outside game than D'Antoni's offence. It's a better offence in the sense of versatility by far. D'Antoni's O makes the game that of a wing player, Winter's offence picks team's weaknesses apart offensively, and bolsters any players talents regardless of how limited they are. It can maintain a focal at each position. D'Antoni's is set to serve and favour a prototypical player. The triangle brought out the best in O'Neal, and also provided a niché for any roleplaying no-name along the way, Longley being the perfect example.
D'Antoni's O is top notch, but the triangle surpasses it in its timelessness and its effectiveness regardless of who's implementing it. D'Antoni's small-ball suits teams with Amar'e Stoudemire at the 5, and that can be countered far easier than the multi-faceted △.
You can throw around stats all you want, but when you talk about the lopsided inputs of O&D with D'Antoni, you'd get lost in the disparities. The triangle forced cohesion and understanding, D'Antoni would just run defences ragged at the cost of his own defence.
△ > 'Antoni.