As the American models use two different shades of purple for their controllers instead (a darker shade for A and B and a lighter shade for X and Y) and the localization was in production alongside the American SNES, it's possible that they either had originally intended to keep the Japanese coloring on the US controllers or that the localization team weren't aware of the US controller's redesign. Aside from minor typos and spacing differences, the prototype's script refers to the A/B/X/Y buttons by their color on the Super Famicom's controller rather than their letter, as in the Japanese script. Some of the game's dialogue and textbox strings are slightly different.

The letters A and B have already been redrawn from the Japanese version, but the numbers '1' and '2' haven't.

The unique star graphic for files with 96 goals has been implemented as well.

The title screen is identical to the Japanese version aside from the translated file select text, which matches the final US version.

Yoshi's inability to eat dolphins from the US version is already in place.

The ability to re-enter completed castles by pressing L + R has not yet been implemented.

Funky has all the extra green berries from the US version, but the end still says 'YOU ARE SUPER PLAYER !!'

Donut Plains 2, and Donut Secret House still have their layouts from the Japanese version.

The sign on the mailbox at Yoshi's House is different, lacking shading as with its Japanese counterpart.

The graphics contain a few more leftover Japanese characters than the final US version does.

The font would end up being partially used in the ending text of the final US version the lowercase letters use this early font while the uppercase letters use a variant of the classic thick 'Atari' font.

This font can also be seen in the aforementioned commercials. The text box font is slimmer and has a differently stylized '4'.

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