Imo, grips are harder on your fingers. You tend (at least I do) to hang in them whereas without them you slide right out. As for pitches, that cannot possibly be a problem for any semi-competent driller. I'm with Jeffrevs here - go gripless, you'll never go back.
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"To plunder, to slaughter, to steal, these things they misname empire; and where they make a wilderness, they call it peace." (Tacitus)
"If one tells the truth, one is sure sooner or later to be found out. " (Wilde)