When you say that yours is better than someone else's, you are also inferring that theirs is worse.
So yes, it is an offensive move.
If I say, for example, "My cheeseburgers are better than mcdonalds!" I'm promoting my cheeseburgers and putting down mcdonalds' cheeseburgers. I am not using mcdonalds cheeseburgers as a point of reference, that would be stupid when used in cases that are subject to opinion.
Wait, wait, wait.... Did I say mine was better?
According to the players, my dogfights are better then Jorgur's. I usually have a ratio of 35 players when I host a dogfight.
Hmmm. I didn't say that, I said the players said that. The ratings are higher than Jorgur's.