First of all a few question if I may be so bold.
Why do you think you need to compete?
What are your expectations from a competition?
Do you think competing will enhance your skills?
Now here is my view on competitions and some will crucify me for it.
Each competition has a certain target audience and rules/judging criteria, if you want to win you have to exceed those expectations and proove better than the other guys trying to do the same.
I have seen the same kits get ripped off in some compeititions and take gold in others.
So, if your goal is winning a competition than you need to build towards that end(rules, judges and audience).
If you simply want to see how your kits measure up you can either enter them or simply see what has been entered into any given competition.
The comparison can be don regardless if you place first or last.
HTH.