Hi parman
The full paid versions of the Norton Android security products differences are -
NTS is fully designed for tablets with great UI and all the features a tablet requires.
NMS has all the same features and a few more which can only be used on mobile phones being the SMS Anti-theft feature
remote commands.And the NMS UI does not look as good for tablet size screens.
I have used both on my tablets and prefer to use it as it is designed for tablets only that being it was released after NMS .
Hope that info is helpful.
Cheers. :-) :-)