This trailer was made and released much closer to release and contains gameplay closer to final. It was also included in Spyro: A Hero's Tail.
General
The trailer contains multiple voicelines that don't appear in the final game, such as Cortex's "Don't touch me!" and "Will this suffering never end?".
The camera in Cavern Catastrophe is different.
Specific
The yellow gem is misplaced out of bounds.
This cutscene uses Cortex's demo animation, yet contains natives from the final version's cutscene.
The camera is not locked in the airship.
Uka's eyes are misplaced.
The crate layout is different, with random platforms around the area where the 3 switches are.
Slip Slide Icecapades' long rail contains the green gem instead of the crystal.
The purple gem is placed above a rock in the second part of the N.Sanity Island hub instead of at the puzzle in the back of the picture.
The puzzle in the background grants the red gem instead of the purple gem.
Gas pipes do not seem to activate during the character switching cutscene.
(Although, the player could have entered the cutscene through special means)
The lighting of the textures in Boiler Room Doom is different.