For what it's worth I have found this out after lots of trial, error and personal frustration.
I used a glove and split fingers for years and was happy, I then got and used the "Super Archer Mitt" which was superb. I switched to 3under and used a glove and was again happy with that (I love the "American Leathers" offerings particularly their "Crossover"- I really feel you get what you pay for from AL)
I switched back and forth between the glove and a Safari Tuff 3under tab, which gave me excellent results in consistency and the absolutely sweetest release but highlighted bad habits I had formed behind the bow, mainly head alignment & over drawing, which basically gave me great groups but always left and I carried a sore and often bleeding beak! I am working hard on sorting this as I can't ignore that level of consistency and, as mentioned thats (mostly) what the big boys use.
I think most folks would say that a glove is the more convenient and better that a lot of folks can be, but a tab will give you a better release (YRMV)
No right and wrong, just another one of those preference things based on whats important to you