Is there any difference, musically, between F sharp major and G flat major?

I know according to music theory, they technically represent the same tonal values on a major scale. But since the key of F sharp major has 6 sharps and G flat major has 6 flats, a musician might be inclined to interpret and play the same piece transposed to these two keys in two different manners (either... show more I know according to music theory, they technically represent the same tonal values on a major scale. But since the key of F sharp major has 6 sharps and G flat major has 6 flats, a musician might be inclined to interpret and play the same piece transposed to these two keys in two different manners (either consciously or subconsciously). Any thoughts? Has anyone tested this out?
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