As in most high level competitions there are tricks of the trade. I worked with a photographer that competed at the upper levels of print competition eventually winning at the National level.
We were always looking for a better mount board - flatter, deeper black (or even deeper red), and more shiney. I spent time in a spray booth at an auto body shop spraying these mounted prints with many coats of lacquer trying to build thickness and polishing them. A surface finish almost 1/16th thick and perfectly flat with more shine than glass. Trying to make the actual image appear to float above the board when under the lights by mounting a suitable color paper under the print and giving it a fine line of color around the image. I'm sure there are new tricks these days.
The mounted prints are submitted to an officer of the competition before entering. They are assigned a number only. The officer keeps the record of who created the prints secret and the prints are taken in to the salon where a jury decides which are up to standard to be "hung". Then one at a time the prints are hung in the specific lighted spot and the judge, one or more respected photographers with expertise suitable to the subject matter of the competition (corporate portraiture - small product photography - sports - etc) judges the prints live and in front of all. Then the awards are presented. If you like photography it's a lot of fun.
Long ago I competed in my area and as photographers like to say "I was well hung."
But then I became a Framer.