They can rather easily discern between the two in double blind tests. The vinyl recording has a noticeable amount of noise in it. Vinyl record players can't exceed the kinds of signal to noise ratios that human hearing can detect. The more ridiculous claims are the audiophiles who pretend to distinguish between ultra high sample rate audio and 44100Hz or 48000Hz sampled audio.
You are comparing the wrong things in the test. Play the vinyl record, recording it in cd quality, then compare that recording with the original vinyl. They won’t be able to tell the difference.
