Since the times indicated by Mapquest are nearly identical, I would tend to use I69 through Houston. There is a small number of little road repairs being done on it. You can check with
https://traffic.houstontranstar.org/layers/ I've found the interchange in Dallas when moving from I35 over to US75 to be a nightmare. Clearly your date/day/time will impact your travel through those big cities more than anything. I travel Houston frequently and through Dallas regularly. Driving on the interstates through Dallas has always been an irritant.