All Dark/Light/Lady Troopers are based off of the 05/06 Nexus body depending on the year. The milling is very easy to tell apart from the stock Egos. Not to mention the glaringly obvious London Nexus badge on the butt of the guns
Also, depending on the run, some Troopers may have the Dark frame and/or Maniac board. Those are mainly 06 runs.