Sorry, I'm still not convinced.I actually wasn't sure if I should speak on this myself, but there is a beat missing from the mp3.
I'm pretty sure the beat is the same. maybe in yours we can hear better the trumpet starting to play, but to me the actual beat is hearable also in mine.
idk.. maybe QAT should decide if I can just keep my mp3 or not.
I mean, as far as ranking's concerned I doubt it'd be a problem since it doesn't affect the beatmap and its playability, it's solely a difference between the original audio and this, as if the beginning lagged or is stunted. But since the mapping's based around it, it doesn't really make the map any less playable.
Made a comparison video of sorts, though it isn't exactly side by side: https://youtu.be/G2GZrDT53sI