SPS – SharePoint Portal Services
STS – SharePoint Team Services

It is easier to manage and much better for a team environment where there is not much Document Management going on.
Above SPS features are not available in STS.

This is only for team based environments

Thanks for learning my blogs!
***********************100 Blogs in SharePoint *********************
I have reached 100 blogs in SharePoint .Thanks to C# Corner Team for encouraged me.And thanks to everyone those who all are supported me.