Not in Velco.
They’re both equally supporty, but in very different ways. PD specializes more in preventing you from being hit with bad status effects, or from being knocked down, and it has an incredible single target regen heal that almost nothing can kill you through outside of being oneshot. Kabba gives you more HP, can give you SP, and has a big group heal/defense buff.
Both are exceptionally good in their own way, but it depends more on playstyle and what you’d prefer. I find that for learning difficult content like Velco, kabba is better, but riskier if your’e unfamiliar, as you have the only skill left in the game which can heal Velco a lot in phase 3 when he upheavals. However, after the initial push of learning, bloodletting is just too good to pass up, because Velco’s autoattacks silence, and he does them the most often. The silence isn’t threatening, but lowers group DPS enough that bloodletting becomes a much more beneficial group support when everyone is used to the fight.
PD also has better DPS options, and is more versatile, but I would call kabba the better “group” support.