I think that depends on the type of workout and your personal preferences. The pros of fingerless grips are that you can quickly turn them around or fold them back for movements where you want direct skin contact, such as rope jumping.  Some people also prefer how fingerless grips feel on the bar while doing pull-ups or toes-to-bar.  Personally, I think the dowel effect that finger holes offer makes grips that have them much more efficient for high-rep movements on the pull-up bar. So I would choose finger holes over fingerless, unless I know that the workout calls for quick transitions to movements where grips would be in the way.