Reference managers: Endnote or Mendeley?

I have used Evernote for a while, so know it to a certain extent. Being at the very start of my PhD run, I want to start building a new library as effectively as possible.

Both these two tools seem to offer similar features, such as dragging and dropping PDF’s into the program, and it automatically creating the reference. It also seems both allow for citing while writing (at least in Word)

However, I also like to take notes when I read, or have read an article, so as to fast retrieve the key points later. Mendeley offer this feature, so for now, that will be my choice.

Here is a good description of how to import into Mendeley (PDF)