I would not be surprised if the 645nm and 660nm emitters you saw were actually the same wavelength, reported two different ways.
Some manufacturers or retailers list the peak wavelength, which is where the maximum output occurs on an optical power basis.
Others list the dominant wavelength, which is where the maximum flux occur on a luminus basis - it is adjusted based on perceived brightness according to the luminosity function.
It appears a peak wavelength of 660nm from a monochromatic LED works out to a dominant wavelength of about 645nm.
On the other hand, I am skeptical I could tell a 660nm peak LED from a 645nm peak LED.
Oddly enough, Creeās XP-E2 datasheet lists dominant wavelength for the red, but peak wavelength for the photo red. So the two are slightly closer in practical terms than the stated wavelengths indicate - the red has a stated dominant wavelength of 625nm, but from the spectral graph, the peak appears to be about 635nm.
The XP-G3 datasheet, in contrast, lists both peak and dominant together for the photo red.
That makes three C01R for you if I counted correctly. The odds are quite good that we get to see the deep red tint as Sofirn applied for a MOQ of 1.000 pcs XP-E2 deep red 660nm. Since Sofirn is quite busy now and there is no information when those XP-E2 deep red will arrive in their factory, we need to wait for an update from them.