[Suicide Junkie]

Each hull has a custom speed limit.

And the actual speed of each ship depends completely on the engines it uses.
IIRC, in the default, they only use either Ion or Quantum drives, which results in fast and slow Versions of each ship.

If you increase the number of choices to pick from in enemies.txt, then you'll see more variation in speed.
You could also create extra engine components with the same class name as the existing drives.

When the files ask for "Ion engine", it will pick a random component among the ones with a class name of "Ion engine"
That would also add some variation in ship speeds.


Now, I don't think it would make a major difference to gameplay in the end, but it can be done.