It's possible that one of them is a replica badge.
The replica one I have has slightly thinner font (though yours both look the same) and not positioned accurately.

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The back of the replica badge has a flat aspect to the silver metal, whereas the original ones I have are all rounded.

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I've got 3 badges that are replicas (sold as such) all with flat back - roller badge obviously too small

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- P7190009.jpg (87.98 KiB) Viewed 1500 times
Originals

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- P7190007.jpg (78.32 KiB) Viewed 1500 times
Couple of questions - Were these the only 4 badges released up to 1969 and was the #1 Road Roller the only one released with a model?