For Multiterm, there is Multiterm Convert, Core and Desktop, so I assume the one that says "Remove suite of products" removes all three.
However, for Trados Studio 2011/14/15/17, there is only Trados Studio 2011/14/15/17.
My only guess is "Remove suite of products" removes WorldServer Components also?
Also, I cannot think of a reason why you would want to uninstall one, but not the other.