Rainbowing. Overzooming. They're sharper than the R2s but that can somewhat be remedied on the R2s with LimitedSharpenFaster and/or FastLineDarken, I think. But the R2s have the ugly teal shift.

ETA:

Puto, a friend of mine who helps me with my sub projects, says the R1 source has a terrible problem with color bleeding on account of the source material. This affects all Funi-based releases except for, for some reason as I mentioned, the R4s of 1-13 which come from a different source and have minimal filtering.