Greg;
    The Models in sport and profile scale are judged from 15 feet. You provide in your documentation a 3-view, or an unpainted 1/72 plastic model. The judges then compare your airplane to the documentation you provided. They will judge how the outline and shape of features of your model compare to the documentation. They will reduce your score for things they notice like oversized tail feathers, landing gear in the wrong locations, and if your airfoil is grossly different. Example  a Cub with a fully symmetrical airfoil. You will also loose points for not having dihedral in your wing if the real one had dihedral. Hopefully Chuck will chime in here with more information.

Leroy

Any time you put your pride and joy out for judging you may get your feeling hurt.  I once had some tell me that My Snoopy pilot in mt Eindecker was cute but that it detracted from the scale appearance of the model.  I am in this hobby to have fun so snoopy stays!!  Don't get me wrong it is fun to win, but I show up to have fun.  I am new to control line scale but in the RC world "Best Of Show" means big bucks spent + a 1000 hours of work.  SO my advice is read the rules, do the best you can but above all have fun.

...but basically to the original question...

Most Scale scoresheets I've seen had a range of numbers regarding the various aspects judged.

A model of a prototype, which had a smallish tail on a longish arm from CG, is obviously not accurately scaled if it has a (relatively) gigantic tail on a shorter arm from CG  - as would be fitting for a Stunt/Scale model, where stuntability is more important than precise accuracy.

So, proportions take a hit in the score lines where they apply. A good job in representing the type and specific example modeled should be awarded appropriately for aspects which do apply.

The more popular current scale events don't involve micrometer comparisons. General, convincing representation of the type and example, done reasonably well should score reasonably.