Windows Authentication Services

Mac OS X Server version 10.4 Tiger or SUSE Linux Enterprise Server 10?
Which is better between the two server operating systems when it comes to (a)directory services for mixed-platform environments, (b) authentication services, (c) NT Domain Services, (d)print services, (e) pricing.
I am planning to switch from my Windows Server into either both of these server operatings system. What are their differences? Thank you so much for your answer in advance!
And also, I would like to setup an FTP service… Thanks.
Try Search on internet.i’m sure you find it…
What is Windows Azure AppFabric?
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