I just don't understand, why would they call themselves Newton British, it's easily confused with Newton International. NIS has a not very nice reputation as per qatarliving parents opinion, so maybe it's better to change a word Newton for NBS? You hear Newton, you stay away. That's weird, there are lots of other great scientists' names except Isaak Newton that can be used:)
If all those schools have the same management, don't expect NBS to be different from NIS.