I think it's basically everyone's opinion that watched both, which is why 10 Years Later, 'Avatar' Is the Most Popular Movie No One Remembers https://www.vice.com/en/article/bjw4bv/10-years-later-avatar... which obviously is not completely true, as evidenced by this post, but one thing I have noticed is that whenever anyone mentions the movie Avatar someone always comes in and says I got excited because I thought we were talking about the other one, but whenever anyone mentions the other one nobody gives a damn about the movie.

on edit: I guess 13 years later, but who cares, it's Avatar the movie.