N3DS Adv and Disadv vs 3DS
+ Thumbpad feels more plastic and doesn't feel like it's slippery or wearing down due to better material (AKA Much better for Smash Bros)
+ Small sensitive c stick for precision and more interesting gameplay (Also much better for smash)
+ Similar price to N3DS (Only for now)
+ Face tracker helps 3D to always work as long as you are in its field of vision
+ Extra buttons on back
+ Slider for volume now on top so you don't hit it accidentally when playing
+ Extra battery and customization (2nd For N3DS only; Not XL)
+ Will have games you can only get on the system
+ Images look slightly better
+/- Uses MicroSD, can be unconvenient for some but I dont really mind, I say its a plus
- Must use screw on back to get to MicroSD
but the N3DS has a file transfer program build in, so you won't have to unscrew the back
