With Pocket, Kippt, Evernote to collect stuff in a organised fashion is 4-5 clicks. With dragdis it's 1 drag&drop!
So main thing - simplicity
Something else: I think positioning yourself against pocket is a bad idea. They're two different products. Pocket doesn't try to be a reference/long term bookmarking product, but a read-it-later type one. It even started with that name.