They're the same songs. The first recording has no dB increase. The second recording has an 8 dB increase, which leaves around 6-8 dB of headroom before the tape can no longer store information. I didn't do the original transfer. I got the tape like this recently, and since I already had a transfer of the song, I decided to sell it at a price that wouldn't tempt anyone to release it.
I must admit that I haven't cleaned the used DAT player in a while. I did the transfer to verify that the tape plays correctly.