i have 1000 DSD128 vinyl rips from Lps i own, and can easily hear the difference on each one. vinyl always better, even though i like the dsd 128 files. on some of those files i also own PCM tape transfers which i prefer to the dsd 128 rips. that result varies.
i have DSD 256, 15ips 1/2" tape, and 30ips 1/2" tape from the same mic feed from
this recording. i play the DSD 256 file often (really enjoy it) and have on multiple times compared the dsd to the tape. not close, the tape more than slightly better.....30ips better than the 15ips.
these results have been consistent whether MSB Select II, Taiko Extreme, or Wadax Ref dac and server, and also either Studer A-820/King Cello or ATR-102 w/MR-70.
honestly hard to imagine that you truly cannot hear a difference from the dsd 128 transfer to the source tape. but respect that's how you hear it. maybe your digital is better than mine. or my tape better than yours.