Have I understood correctly, based on the results I posted, the picture styles have the following approximate stop differences between the green & blue channels:
Cinestyle: 0.5
Faithful: 1.5
Landscape: 1.5
Marvels Adv: <1
Marvels Cine: <1
Neutral: <1
Portrait: >3
Standard: <1
Based on these findings, then either Faithful, Landscape or Portrait would give the best keying results?