speedy damier azur vs epi speedy?

If you're having doubts, it may not be the bag for you. Nothing is worse than buyer's remorse. Maybe you should sleep on it tonight. If you don't feel good about the purchase tomorrow then you should exchange it for something that you like better.
 
If you aren't happy with your azur speedy, then I would take it back and get something that you will be happy with -- the epi speedy. And then if you realize that you want the azur again, just can just buy it again since it is permanent and not a seasonal or limited piece.