OK, I see. I'm still wondering what explains the contaminated reds on PII that we didn't appear to have (or at least not so much) on PI.
In Phoenix Mk I, one possible answer is M+Y layers inhibiting C + high contrast from a lack of masking = saturated reds.
In Phoenix Mk II, there seems to be better control of contrast and saturation via the magenta component of the masking, which reduces contrast in blue & green, but without the yellow component that should sort out hue shift in magentas and reds & help with saturation of yellows. There's also the high likelihood that interimage effects for more favourable saturation & colour characteristics relative to contrast could be brought to bear.
As for 'improving' Phoenix II's red handling as it stands, I think you'd probably be looking at needing to make separations & manipulate those via masking or retouching etc.