Originally Posted by MidnightEnnui

It would be reasonable to bet that DFW-BZE would fly out of Terminal D, like most recent flights on that route. I would also note that there are a smattering of data points that have the flight flying out of Terminal C.

I will let others address the GH versus the HR, but I just wanted to bring your attention to your plan to eat breakfast at the Centurion Lounge. Complimentary guest access will end 2023 February 01, so unless you each have an eligible card or you spent $75K this year, you might need to make alternate arrangements. Capital One has a newish lounge in Terminal D that I have not yet had a chance to visit, and of course there is The Club, but I would not expect a breakfast of consequence there.

Originally Posted by ElevatorEnthusiast

Both are fine for an overnight - honestly, the big benefit of the GH is the Globalist breakfast, which won't apply to you. I would save the money and or points. The distance and convenience factor between the two properties is often overstated, IMO. DFW is a very easy airport to get around, and so are the parking garages (as long as you aren't driving).