Both ALS models come in dark gray, black, red, and indigo. I actually had a pretty hard time finding them, and was unable to find both in one place. Many places were sold out. Almost as hard as finding a DS before Xmas! Couldn't decide between the two ALS models in the store so I bought both to try out (gray for both). Took 'em home and put the stuff in them I would normally be carrying.
The bigger one (NDS15) is, well...big; more along the lines of a carry-all. It holds nine DS cards in plastic pockets, but I didn't like how fiddly it was getting them in and out. Various net pockets secured with zippers or elastic can hold GBA carts and other stuff. Both a shoulder strap (WARNING: You should be very secure in both your sexuality and your reputation before employing this) and a smaller hand strap are included in a pocket on the top. The way the DS unit slides into a semi-hidden pocket on the side was kind of cool, if impractical (and it was a tight fit, making it hard to shove the strap in there with it). Plus, there's that whole man bag factor.
The NDS14 is obviously smaller (about half the size), but it still has space for eight DS cards via a somewhat ingenious strip of elastic stitched into eight pockets. Another section behind that can hold a stack of GBA carts and the AC charger, maybe a small pair of headphones. The DS unit is held very securely on the facing side with an elastic strap. Padding is sparse, but some hard panels seem to provide good protection. The main drawback to this case is the handle, which tends to make the whole affair look like a little girl's purse or makeup bag. But it's forgivable. The deciding factor was my wife saying, "I may carry that for you in my purse. If you pick the bigger one, you're on your own." So the NDS15 goes back to the store.
