What @spectrum said :)
My experience this year as a competitor at my first show with multiple judges was that on the test where the judges scored me differently by about 10% (can't remember the actual point difference but the judges didn't seem to agree on much based on individual scores and comments) and one of the judges consistently gave me unhelpful comments I was certainly less than thrilled. It is harder to implement comments when two judges give you two very different and mutually exclusive opinions. That is frustrating and confusing especially as someone newer to dressage.
As a rider I have no problem showing in a front of a judge who gives "harsh" scores but is consistent, uses the full range of scores, and gives good comments. But I will admit I will think twice about judges now that I know will not give me comments that are useful to my improvement. Telling me I did something badly is one thing; telling me I did something badly but why or how to fix it (at least to an extent. I know judges can't write a novel) is entirely another.