I was just at the store today and compared the two. I like the how casual the delightful looks and from what I read it's super comfortable, especially after a couple of months of use. For me the con is that there is only the one pocket and it's really deep. When you put your stuff in and the canvas slouches or even folds over (which I like the way it looks, but...) I almost think it would be a little bit of a pain to get in and out of. I imagine it would be hard to see your stuff unless you opened it completely up at the top (if that makes sense), maybe people who own the bag just know what to grab for but I like to see it too.
The galleria, well let's just say I almost walked out with this bag but I decided to sleep on it at the last minute. The price is what kept me from buying it. I really liked the look of this on, it's a little more structured but over time you'll still get some sag but not to the extent of the delightful. The opening is smaller but I don't think you'll have the canvas folding over so at least it will be more open when trying to grab what you want. I loved the interior and the fact that there were 3 pockets was a huge bonus for me.
Either way they both are nice, but I'd say the galleria over the two. Especially for your first bag, go big or go home! I'll most likely be going back and buying it.