You are both right...the crowns that David show are all post 1975 ...when Juan Carlos I became king.
But David is right about the simil with british crowns...you had the king crown until 1953 and from that year the queen crown...We had in Spain the Imperial crown until 1975 and the Royal crown from that year.
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This is the Imperial crown we had until 1975...in the Franco's era
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A tank beret with the Imperial crown
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This is the Royal crown we actually have
About the pictures you show...they are only different styles of the Royal crown...
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This crown is an early type...as you can see in this Marine badge
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This is a modern style...as you can see in this army badge..