Because the level of thought, care, and intention is different.They are movies. What does your qualifier "just like" supposed to mean?
And how people treat them when it comes to what they mean for the material is different.
Did Star Wars fan feel they were tied to the events of those movies just because it had the Star Wars moniker on it? No.
They had a different level of significance to them because of how it was released, the reaction of fans towards it, and the lack of support from LucasFilm in insisting that they mattered.