From all the information I have, they are exactly the same. My LEDs were 3057, and my Silverstars are 3157's.
If you live in Canada, I have like 3 extra pairs of the Silverstars I don't really need - I'd be happy to see them to a good home if you'll pay shipping (you can't buy these in Canada)
and in case you wanted to see the look of the blue/yellow Silverstars installed, here you go:
