Image processing has been changed for the the 50Mb mode it's more natural in a way. I personally edit the pictures afterward, but the beta 2 update has made the image less vibrant in the 50Mb mode. Look at the color around the duck.
As for images outside, it's different but still good.
Please consider the slight fluctuations in how the sensor harbours light, as this can affect the exposure a little. I do not expect drastic changes though. Can you highlight the area