One way you can decide is how you grab the pull up bar. Thumbs around, fingerhole may be better, Thumbs over, fingerless may be better. Especially when using for muscle ups thumb over the bar is the recommended use when completing bar muscle ups. But it does come down to personal preference. Fingerholes also offer other options such as to be used on KB's or on a barbell as needed. It's also worth noting you do not necessarily need to put your fingers all the way in the fingerholes, and just to the first knuckle will often give you more of a dowel effect to lock onto the bar with. Again test and trial and see what works best for you.