Answer:
While Member 1 is an upstand beam, Member 2 is a downstand beam. This results in a compression axial force for Member 1, and a tensile force for Member 2.
For the concrete design, a compressed cross-section is more favorable than a tensioned cross-section. For comparison purposes, here are the axial forces of the members:
Now, if you deactivate the axial forces for the design in RF-CONCRETE Members, the result is a required reinforcement that is affine to the moment distribution:
With this setting, you are on the safe side for Member 1, but on the unsafe side for Member 2.