Difference in two K8T Neo board versions?

[jjlawren]

While looking at the K8T Neo board, I've found there are apparently two versions:
K8T Neo-FSR
K8T Neo-FIS2R

Here's the link to the Newegg listing of the two boards:
http://www.newegg.com/app/viewproduct.asp?DEPA=1&submit=Go&description=k8t%2Cneo

Can anyone figure out the difference?

 

[IBdaMac]

I think the "2R" has another IDE hookup for RAID?