[1911FiX]

There is no definitive answer.

Whichever way, just make sure it works with your anatomy, works with your gun and you train consistently with it.

I started off using the slide release. Then when I started taking training seriously, I found that racking the slide was more consistent, worked with more pistols and didn't force me to change my right-hand grip. Then I bought more very tight fitting guns, and started doing more competition and, in trying to shave off more time, I'm back to using the slide release.