The cycling gloves that I have are quite elasticated and give a snug fit, for gripping handlebars. Fingerless sailing gloves that I’ve owned are looser and designed for sailing, not gripping oars. So the material shifts about on your hands, which can be bad news. I’ll bet that cycling gloves are cheaper too.
I can’t remember which SailCal year it was when there was no wind and we had to row the length of Loch Ness and most of the way back but I didn’t get blisters. And before you say anything, I did more than my fair share of rowing!