While noodling the other the night I decided to partake in TalkBass advice #3: [yes I am giving these random numbers] Listen. The open string and the twelfth fret are the same note [just an octave lower]. I was trying to hear how they were the same, but I just can't. Beyond the dept of the sound the major difference to the sound was that the fretted note [does that sound off hand?] sounded very metallic while the open string sounded more woody, from the plastic nut.
I should try this with the "one string over, five frets down" same notes.