Here is the Flytec 6030 with bright sunlight shining on the
screen:

The Naviter Blade:

I've done my best to set them at about the same angle with direct sun on the
screen. I would estimate that I can see the Blade about half the time while
thermaling if the sun in shining on the glider.

You don't need to always watch your flight instrument. I just listen to the
lovely sounds of me climbing up.