The Sony a6500 came as a big surprise to a6300 owners in that their camera was loosing value overnight in the secondary market to a near identical close with a touch screen and IBIS stabilization. However the camera has still not reached the hands of many pre order customers but we were able to find a few insights on the 120fps full HD slow motion mode.
The quality should be very similar to the a6300 since the sensor is identical but with slight improvements in the dynamic range and color pipeline should yield a slight increase in per pixel definition. The compression should be very close with the XAVC-S codec at 21Mbps at 24p and or 50Mbps at 60p with easily selectable formats.