Left - internal AVCHD transcoded in post to ProRes 422
Right - external ProRes recorded on PIX 220 via HDMI.
First version as recorded, second version with identical settings applied to both sides.
Plus the compression required to upload to this site.
Conclusion, whilst there are some differences, they are slight except to the trained eye. Both are 8bit, 10bit output over hdmi would have been a nice addition ontop of the SLog2 upgrade.