[Brightcolours]

CA can also be very much sensor dependent. I remember using the exact same lens on 2 Pentax bodies: K20 with a Samsung sensor and K10 with a Sony sensor. The K20 had much lower CA with the exact same lens. The Samsung sensor was less prone to CA than the Sony in the K10. I remember reading similar statements in the dpr forum.  It was actually a nice surprise.

You must have confused something else with (lateral) CA then, CA is purely lens "based". It is what the lens projects onto the image plane, different colours refracting differently through the optics. Maybe some kind of PF got you confused?

 

CA (or the tell tale sign of CA at least) always comes in colour pairs, each colour on one side of a dark area surrounded by lighter areas. Magenta/green, blue/yellow, red/blue-green. The colours depend on which part of the spectrum gets projected bigger or smaller than the rest of the spectrum. Totally uncorrected lenses can show a bigger mess.

 

The only way one camera can show lower (lateral) CA than another, is when the CA colour edges get removed in-camera, or the camera performs CA correction ((shrinking/expanding the R, G or B channel till they all match).