Hmm. I just noticed something.
Rookies - Surge, Blaze, Breeze
- they have the same torso armor piece (probably a default training armor)
- they have "regular" weapons
Veterans - Bulk, Stormer, Stringer
- they have unique torso armor pieces
- they have those multitools as their arms / on their arms
...but maybe I'm just overanalyzing...or stating the obvious...boredom is boring.