When dressed in battle armour they look identical to Spartan Mark Vs. However, they have no mechanical implants or alterations. Despite this, the Galactic Council still believe the Reachites to be abominations because they are genetically created from a machine, and this formed the foundations of the Galactic Council-Reachite War.
After the war, the Reachite fleet was confiscated by the League and they became a peaceful species living in harmony with their neighbours on New Reach. They still like hunting Moa, however, so they're not popular at the PETA headquarters.
In the long run, the Reachites of New Reach and the Grunts of New Reach lived in harmony for nearly five thousand years until the Grunts eventually moved away from New Reach.