Well, I'm going to say this one last time because I'm already tired of all this: If you have an opinion as a judge, and can defend it with valid reasons, then why should the discussion be a problem for you? This discussion is not really to settle scores that were not rating according to the majority, but rather to prove that your score was fair. This shouldn't only apply to the judges whose scores don't match, it should apply for all them.
This is an official competition, guys. Of course the fun you have with the level counts. But remember to rate not only on what you feel, but on what you actually see (or play in this case). Of course you can still say "This level was not really fun to play" as long as you still point out the "However, I noticed this level had this and this", and "But this level felt fresh because of its concepts", if that's the case. If you don't have fun playing a level, yet it's a noticeably good level, then you should take everything, not only your fun in consideration, or vice-versa.
Maybe your alternative with the host checking the scores and then asking the judges about the discrepancies, could be a good one too, since it'd be easier. As long as the host takes the responsibility for this from now on as well.