After their fight, when the Falcon is helping Sea Hawk up, Falcon's voice sounds completely different for two lines, then reverts back to the same gruff voice as before.
The 'Horde Tax Galleon' which turns into a 'Horde Dreadnaught' is reused animation of the Horde Prison Ship from Return of the Sea Hawk (1985) rather than the Horde Dreadnought as seen in Treasure of the First Ones (1985).