When I did a side by side of a PD-150 and a DVX100 (non A), I did notice some distinct differences in the picture.
I set up a split screen with the cameras focused on the same subject, lit with the same light so that everything was as similar as I could make it, and my initial impression was that the PD150 had more vibrant colors.
I used every setting on the DVX, gamma, 24p etc. and compared them with the PD150 (which I'd been using daily for 2 years at that point) and I began to notice that what I was seeing wasn't more vibrant colors on the PD150, it was just a generally harsh image in comparison.
The DVX seems to have so much more range in the blacks compared to the PD150. Where the sony was falling into black and monotone grey, the DVX still retained subtle shadow detail while retaining colors almost into black.
The PD150 seemed sharper, but as this was likely caused by edge sharpening, the picture also seemed more harsh in its detail.
Finally, where certain colors would pop on the PD150, the DVX seemed to show them as being much more mellow. Looking closer at the two pictures (on the same monitor), I saw this difference being the result of a less accurate color rendition on the part of the sony. The DVX seemed to have a tonal gradation that was much more true to life, with particularly good reproduction of skin tones.
Also, the DVX seemed to handle differing color temperatures better.
I like the PD150 a lot, but to my eyes, it couldn’t even compete with the image the DVX was capable of.
The stuff I've seen shows what you describe... less saturated colors... but perhaps you're right, maybe they are simply less harsh, more subtle, more accurate...
I think this is a trick of our eyes sometimes. Things with only three colors appear bright and vibrant where things with 16 shades of those three colors appear dull in comparison.
To my eyes, the DVX is more true to say...Provia reversal film. The colors are subtle, responsive and realistic...while the PD150 is more similar to a velvia reversal film...the colors are wild, blown out, and hyper-saturated (but totally unlike the scene you capture).