I have 2 DMM6500, one is 2 years old, the other is brand new
The brand new one has a washed out screen when compared to the older one. Both are set to the same brightness level and the screen protector makes no difference. Both are running the same latest firmware.
I appreciate that they possibly have different screens, but there seems to be a lack of quality control if there is this much difference
See the attached picture
Regards
Dale