question with server

[GoijI P]

Sorry if this is off topic to you and it may be but could not keep myself 
from bringing it up.
Like to select a platfrom as server between linux or MacOX server.
In general , which is preferred?. any experience with either one?. clients 
are all going to be all windows. World only sees either linux server or 
MacOX server. My concern is security for PC windows clients.
--G

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