Have you read all of the previous posts, angel8848? Perhaps not—it’s a long thread! (It’s worth having a look at as many as you can.)
The question you ask has been touched upon before, but not resolved, and you will probably get many different answers.
As I see it, your sentence doesn’t contain a comparative: “quite different” is simply a statement of fact that “the competitions” were not the same; “quite different” does not say that one was bigger or better or faster or longer than another, and so the use of the comparator “than” would not be right.
Many people do use “different than” (even when there is no comparative). Many people, and I am one of them, disagree: I strongly recommend you use “different from”.
The question you ask has been touched upon before, but not resolved, and you will probably get many different answers.
As I see it, your sentence doesn’t contain a comparative: “quite different” is simply a statement of fact that “the competitions” were not the same; “quite different” does not say that one was bigger or better or faster or longer than another, and so the use of the comparator “than” would not be right.
Many people do use “different than” (even when there is no comparative). Many people, and I am one of them, disagree: I strongly recommend you use “different from”.