whats the difference between these two shoes?

Question

ok these are 'pewter' (btw, what is that?)
http://www.target.com/gp/detail.html/ref=br_1_26/602-8632566-6900668?ie=UTF8&frombrowse=1&asin=B000QF9Y5Q

and these are 'black'
http://www.target.com/gp/detail.html/ref=pd_ecc_rvi_1/602-8632566-6900668?ie=UTF8&asin=B000PGCA0C

Answer 1

Black is, well, black. The pewter is a dark silvery metallic color or a dark grayish color.

Answer 2

They seem to be different materials.
Also, the pewter (don't have a clue, lol) seem to be more of a tighter look than the black ones.
I think that's it, lol.