I haven't submitted anything for judging yet, but from working with BIAB kits, I get them in 23L capacities, so I end up kegging most of a batch then bottle conditioning the rest. I've found with one of my pilsner beers that while the kegged version tasted great, there was something to the bottle conditioned beer that gave it a nice flavour that slightly edged out the kegged version. The bottle conditioned one had been sitting out for 3 weeks, but I've found this slight difference in flavour to be true for one of my oatmeal stouts as well.
I figure since bottle conditioning vs. kegging is like asking real ale vs. not quite so, it probably wouldn't be a bad idea to go with a bottle conditioned beer.