I recently discovered the Masonry and Isotope JQuery plugins. They seem to be functionally almost identical and both appear to have the same author. The only obvious difference I can see is the license.
What are the main differences between these two in terms of functionality? Why would you use one over the other?
PrimosK pretty much answared you question, but I just wanted to chime in ...
Isotope is an awesome jQuery plugin. I've successfully used it on multiple sites.
One of the things I like most about Isotope is how customizable it is. It's well documented and it can do almost anything you can think of like extending it with infinite scroll and use custom layout modes.
An excerpt from the interview with the author:
Another difference is license as @AminAriana pointed out. Masonry is under the MIT license, but Isotope is only free for personal use.
You can buy (25$) Isotope commercial license on this page.