The general consensus is that Acid, Static, and Confusion are likely allelic. From everything I have seen Acid seems to be the cleaner/better/stronger allele - sort of a BlkPastel versus Cinny comparison. Comparing Fred's Acid Pastel Spotnose to Josh's Riddler, Josh's animal has a more extreme, pronounced pattern overall where as Fred's is only really pronounced on the posterior portion. The Riddler is also brighter looking. The same holds true for the LemonDrop, Reflux, SuperPastel Acid...