Etiquette
Parallel commissions
Asking two judges for clips is normal; asking each to compete with, comment on or beat the other is not, and each brief should stand alone.
Guides on Etiquette: Being declined, Nothing exotic, Opening well
Commissioning more than one judge is fine: ordering from two in the same week raises no eyebrows on its own. What causes a problem is telling either of them about the other one.
Why the first part is fine
Judges have different registers, different personas, and different ways of reading the same brief, and wanting more than one response to the same material is not a strange thing to want. Some buyers want a worship clip from one judge and an honest read from another, in the same week, for entirely different reasons. Some just liked two portfolios and could not choose. Neither reason needs explaining to anyone, including the judges themselves.
Each commission is its own transaction: its own brief, its own quote, its own delivery. Nothing about running two of them side by side changes what either judge owes you, which is the clip that was quoted, in the register agreed - full stop, independent of anything else you have going on.
Where it goes wrong
The trouble starts the moment one judge's brief mentions the other.
"Judge X said this about the same photos, what do you think?" "Can you make it better than what I got from someone else?" "I'm also asking Judge Y, want to see who does it best?"
Any version of this puts a judge in a position they did not agree to, which is being compared, ranked, or set against a colleague inside a commission that was supposed to be theirs alone. It also puts you in the position of collecting reactions to a stranger's work rather than a review of your own photos, which is not what either judge is being paid to produce.
Why each brief stands alone
A commission is a private exchange between you and one professional.
Bringing a second judge into the frame - even by name, even lightly - breaks that, the same way asking a judge to rank you against their other clients breaches confidence in the other direction. It also produces a worse clip: a judge who is thinking about a rival's version is not thinking about your brief, and reviews from two different judges were never built to be comparable in the first place - different registers, different personas, different people looking. There is no meaningful "who won," only two performances that answer the same brief differently. Even research that deliberately uses several raters keeps their work separate: Hallgren's 2012 tutorial on inter-rater reliability describes coders "who make independent ratings", with their agreement measured afterwards.
This is not the etiquette of an algorithm, where running the same photos through more than one system is a normal way to sanity-check a result - comparing scores from different models is a legitimate use of consistency. It is also not the etiquette of measurement, where a second reading with the same standard method is just confirming a number. A human review is a person's opinion, not a data point, and treating two of them as inputs to average or a contest to referee misreads what you bought from either one.
A worked example
Say you want a worship clip and, separately, want to know what a blunt read would sound like.
The right way to run this is two entirely ordinary briefs, sent independently: one to a judge who does worship well, one to a judge known for an honest register, neither brief mentioning that the other exists. Each judge quotes their own job, delivers their own clip, and neither knows you did the same thing twice.
The wrong way is a single message sent to both - "doing this with two judges, curious who nails it" - which turns two independent commissions into a contest neither judge signed up to be part of. The content of the request barely changes between the two versions; what changes is whether either professional is being asked to perform against a rival they did not choose.
A platform like Rate Cock treats every commission as its own thread for exactly this reason - two briefs sent through it stay two separate jobs unless a buyer deliberately links them.
What to do instead
Send each judge their own brief, with no reference to the other, and let each clip stand as its own thing.
If you genuinely want to see how two registers land side by side, that is fine to want - just keep it to yourself and enjoy the comparison privately, the way you might weigh two scores from a rating tool without asking either tool to comment on the other's number. The judges do not need to know, and the clips will be better for it.