While there are real, subjective differences between major and minor modes, it’s largely just a matter of what you’re used to hearing – transposing from a minor to major (or vice-versa) is definitely the audio version of Uncanny Valley; close enough to the original to make if just sound odd, and far enough for it to, well, sound odd too!
I’ve done it with a few of my own compositions, and without fail the transposed version sounds weird, odd, and usually unpleasant.
