N5K-C5548UP vs N5K-C5548UP-FA

I have a question regarding the Nexus 5

N5K-C5548UP and N5K-C5548UP-FA

First of all I don’t really understand the difference between both.

Also as I’m looking through the matrix for Transceiver:

https://tmgmatrix.cisco.com/?si=N5K-C5548UP

It seems like the –FA version doesn’t take SFP+, or am I wrong?

I’m a bit confused because when you look at the description of the FA it seems like it’s 32*10G built in.

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Thanks in advance.