I took a good look on both the white and black iPhone´s in local store.
I would say that: Both Phones are really pretty.
White iPhone:
is far flashier "bling bling", scratches are less noticeable (if any are made).
Black iPhone:
can be considers better for viewing media on it, due to the sides being in black and hence the screen just melts together with the corners.
I have not noticed any noticeable scratches on the black iPhone in my local store, and it has been standing there for weeks. As long as you don't drop it or use keys against it, it WONT scratch. Not as fragile as some make it out to be.
I even tried applying some pressure with my nails, no scratches.
to conclude, the black one is better for viewing media but the white can be better for standing out.
I have orders the black, but i still have time if i where to change my mind.