The two capitals you downloaded from the Internet are flac, and the difference is 1mb because their time is different. Look carefully at the time length of the second song and the first song.

As for the feeling, if the two capitals are the same sound source, they are absolutely the same.

But now it is impossible to determine whether the two lossless sound sources are the same. It is possible that one is a cd, the other is a master or a fake lossless mp.

aac with 3 turns is much better than mp3 at low bit rate, bass is better at medium bit rate and above, it completely surpasses mp3 and keeps more treble, etc. Close to cd

The amplitude of spectrum is directly proportional to the sound quality, which is totally unfounded. It is totally empty talk

If the frequency is too smooth or the sound quality can be considered to be better, it is difficult to tell whether it is lossless or not, but it is actually ogg with high bit rate. Or aac

As for mp3 of 32, it's easy to hear that it is not lossless

If you look at the sound quality as data, you can only say who keeps more music data, who is better, who contains less irrelevant music data, who is better

For example, mp3 not only loses its compression algorithm to aac, but sometimes it has sonic boom, and aac uses excessive mute, so aac not only keeps more data but also has less irrelevant data.