Difference between TI-84 Silver Plus Editions

I am going to buy a TI-84 Plus Silver Edition. But on amazon.com and other sites i see a silver faceplate version, a blue faceplate version, and a black faceplate version. what is the difference? just the faceplate or is there something more?

Its just a different faceplate. A sort of 'vanity plate'.
Won't affect the operation of the calculator in any way.