Submitted by: Rlan

Knuckles shows off his uppercut moves at the top of a building. The move was taken out in the final game.

Submitted by: Rlan

Like the punch, it has three steps. This is the final step with some effects added to it.

Submitted by: Scott Prower

Tails flies through the first section of Speed Highway. The buildings are quite different, and are brighter in the final game.

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Submitted by: Scott Prower

Again, darker buildings present. Also I don't think the road underneath Tails exists in the final game.

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Submitted by: Rlan

Now here is an picture of the final stages of Tails final level, but where are the speed boosters? The giant missile is also missing from the buildings rooftop.

Submitted by: Rlan

This bowl in the prototype video is blue, in the final it's grey, like the rest of the landscape.

Submitted by: Rlan

In the final game this area is vastly different for Tails' game. Robotic cops should be surrounding the area, and speed up bits and pieces should be in the direction Tails is facing.

Submitted by: Rlan

The shooting platform is huge compared to the final one, ans is also set for takeoff to the 'Going Down!' segment, which Tails doesn't get to. Tails' game probably wasn't completed yet, so they just stuck him into Sonics version, as no Eggman race is on either.

Submitted by: Rlan

Tails does a little dance during the video, in a section where he doesn't perform it in the final.

Submitted by: Rlan

The clip from the prototype video shows that the original camera angle was a lot lower to what it is in the final game during the first loop.

Submitted by: Scott Prower

Sonic is running through an unknown area, with buildings that are a lot darker than in the final game.

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Submitted by: Scott Prower

This section of Speed Highway at dawn doesn't exist. It is the same area that was in the first Knuckles picture.

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Submitted by: Rlan

In the video Sonic runs down the 'Going Down!' segment of Speed Highway, but half way through he dissapears for a second, than reappears moments later. This was probably an early glitch.

Submitted by: Bartman

Also in the early videos these signs of 'Level' in the HUD. They don't appears to be used at all, and were taken out of the final release. Also, the ring is larger in the HUD than the final.