While I agree your observation of people getting annoyed by you when you post things in the MegaGlest forums is correct, you are missing the point about the underlying reason: it is not because you mention GAE, not at all. I think it's healthy that there are two projects and that there is a little bit of competition. The real reason you are not making friends is that whenever you post on the MegaGlest forums you point out how GAE has, as you say, already solved some problem, and in a much better way. You are clearly subjective, and you state things as if they were facts. This can support the impression that your long term goal, whether unconsciously or not, is to draw people away from MegaGlest towards GAE, using subjective arguments.
Maybe that's not the case, it's hard to tell, but clearly you're subjective enough in the wrong place. You would not go to a marriage and tell the bride groom how cute the girl next door is, would you? I'm sure you're welcome to praise GAE over the top in the GAE forums. You are also welcome to mention GAE in the MegaGlest forums (if maybe not at the same frequency, after all these are the MegaGlest forums so the focus should be on this), and, if you can make it to compare both projects objectively, you're also welcome to compare the features which are already a topic of discussion, just please don't overdo it. Thank you.
Finally, to not cause a bad impression: I am happy there is GAE, and I like some of its features better than MegaGlests'. And if it is going to have a working cross platform network gaming support then, for me personally, it can become a real competition to MegaGlest in the area of multi-player online games (which matter most to me). I wish the GAE guys all the best and hope the project will continue to refine.