Both screenshots look of similar brightness on my monitor. The PMS uses incorrect colors - so if that's what you're used to you may think the TDS looks odd. Looks normal to me though. Also can you show a full cockpit screenshot? I will try to find one of mine. Of course everything depends on the sim environment... is this overcast skies etc etc?
Here's a pic but I'm viewing the dark panel so MSFS will brighten the scene.
fullpanel by Ryan Butterworth, on Flickr
Here's the real one with similar lighting as the sim
realgtn750xi by Ryan Butterworth, on Flickr
Here's a pic but I'm viewing the dark panel so MSFS will brighten the scene.
fullpanel by Ryan Butterworth, on Flickr
Here's the real one with similar lighting as the sim
realgtn750xi by Ryan Butterworth, on Flickr