Taken from the FAQs
DS White and DS Black

One of the most popular colors for this DS, the white and the black has been debated by most owners as to whether to get which one. From what we mainly gathered we realize that DS white will gain a slightly yellowish stain on the button area as player sweat their way though games. There are ways to prevent this. But the most notable ways are to clean the button regularly.

The DS black gains other type of problems, the problem can easily be identified via the Black DS Lite pet name. Finger print magnet. The outer shell of the DS Onyx ( That's black to us Malaysian) tends to attract fingerprint as the casing is glossy. Finger oil and dust is also easily notable on the Onyx DS. Hence cleaning of the DS is required regularly.