Rare is rare, meaning whichever less means rarer. Regardless it is intentional special model or defect (collector induced/defined rarity)
In this case since the question is regarding modern current catalog (i am assuming including anomaly as part of normal edition) then perhaps the most expensive rainbow daytona diamond dial bracelet would be the least produced.
Anomaly Rolex or Special Edition Rolex is another completely interesting subject.
For me it is a totally different game with different excitement, risk, knowledge and skills to buy/collect.
Perhaps we could start even another subforum of rare Anomaly rolex and tudor.