Ryan Cash had an opportunity to compare the new white iPhone with the more traditional black model that many of us know and love. Placed side-by-side on the desk, it appears that the white model is ever so slightly thicker. This is possibly due to a need to filter light, a design problem originally floated back last October and confirmed this week by Steve Jobs.
Apple does not list any technical specification differences between the two models. If you've got a new iPhone 4 blanco, please let us know if you have any difficulty using an existing case or cover with it.
Engadget has a pretty clear picture of what's going on here.