How long would it take for my gap to close? (Photo)

I have some spacing in my front teeth so I have been considering getting braces or invisalign. I really want to get them as soon as possible as I am going to college in a few months. Therefore, how long would it take to fix my teeth with braces or invisalign? My main concern is the spacing. Which one do you think will work faster and be more effective ? Which one is a better choice for me?

No doctor answers yet