A friend performed for me the exact same comparison you are describing here and, in this particular case, we both preferred the 45 rpm LP.
As I texted Kedar today:
“I have been very clear that not all tapes sound better than all vinyl. You really have to go tape copy by tape copy versus vinyl original versus 45rpm vinyl reissue.”
“This is why for some of my favorite titles I have gotten three or four or even five different tapes from different sources.”
“All I’ve ever said is that WHEN (if and only if) all the underlying variables line up in favor of the tape (great performance, great recording, proper EQ, low generation copy from a master tape in good condition, repro machine heads properly aligned, etc.) the tape beats the vinyl and is almost unbelievably good.”
What was his analog playback system? Amps and speakers?