Agree that Nitrogen is #1 and Betcoin #2. I'm not a big fan of 1xbit or Cloudbet but as you pointed out, all ratings guides will be somewhat different.
I guess you are not a big fan of 1xbit because of the accusation they got. My opinion is the same about the ratings of sportsbook as it all depends on every person if they decide that the sportsbook they choose is the best sportsbook while the other think that there is another sportsbook that they ever place bets.