Ugh, I hate posting threads like this but sometimes I guess it's necessary. It's a simple question: What's the difference between these two controllers?

ARC-1882i
http://www.newegg.com/Product/Produc...82E16816151105

ARC-1882i-MS
http://www.newegg.com/Product/Produc...82E16816151131

I can only see very subtle component differences with some of the surface mounted components, toward the back right next to the ethernet port. Other than that I'm not finding any specification difference. Is one just older than the other? Thanks for the help!