When the ship's constructor had finished with the upgrades to the Mobile Suit, it was still very similar in appearance to before the process started, if you ignored the fact that it was actually difficult to see at this point due to the improvement in the adaptive camouflage.
But internally, it was nearly a completely different piece of equipment.
All of the weapons had different internals, the power systems had been modified, the thrusters were completely different in function, and the mechanical structure was modified to be able to keep up with Max's enhanced physique.
Khan whistled in approval. "That's a sweet paint job. Do you suppose that you can do the rest of them like that? I knew that the System of the Kepler variety humans is an impressive thing, but I honestly didn't expect it to be able to improve on a new technology like that."