What perferms better? (Alpha)

So, the question is about alpha.
I know that the besa alpha is cutout (Clip) alpha, but some time ago BF made new type of alpha: Alpha Antialiasing. I dont know anything about this type of alpha, I assume that this is something “new” in game development in a whole because I recently started seeing it everywhere.

Some tests showed that this alpha can be really handy, but what about performance? It looks like a little bit heavy(just a little bit) than Clip and, I guess, works pretty the same (looks like gif dither) and can produse nice gradients… but what about the “cost”?

Alpha antialiasing is definitely heavier than clip alpha, but probably lighter than sort and blend. This is not based on any measurements, but is my best guess based on the (probable) technology behind them.