Every single satoshi on the Bitcoin blockchain are completely equal and the same. Now if you decide to pay more for an arbitrary coin, that is your own personal choice but that doesn't make those coins "rare". As it was said, Bitcoin is Fungible.
https://bitcointalk.org/index.php?topic=5510649.msg64575180#msg64575180Perhaps this is a good explanation of why satoshis can be tracked and how. Simply by assigning ids and tracking them, you can identify rare sats. Lmk if the referenced post makes sense

. Thx