And do not forget the effects of selective/line breeding (even if it is done subconsciously) which can also influence "differences"
Toffee and Candy are absolutely the same. The original two animals were imported at the same time in the same bag and were siblings.
Neo (from RDR) and Sentinel (from Bill Stegal). Mark Haas had one too, cannot remember what it was called
Vanilla and Fire are allelic but definitely not the same, SuperVanilla are nothing like SuperFire.
I agree with you that BlkPastel and Cinny are different but there are others in the complex that are most likely the same, like HRA and GreenPastel and Lori
I will also note that there are multiple lines of both BlkPastel and Cinny that have been imported.
A caution here that there are some lines of Hypo that are not compatible. GCR-line Hypo has proven to be non-compatible and Graziani has two lines of Hypo (G1 and G2) that are also totally separate