I do both, depending on the area getting shaved. As I use ultra mild razors it is basically the same angle.
except that there are opposite statistics on certain razors with large gaps.
I’m somewhat confused. In your Nodachi review, you mention that you used a steep angle and had a DFS shave. However, the Nodachi is designed for a shallow 24 degree angle.I use whatever angle is appropriate for the razor + blade system.
If a particular razor + blade system needs a shallow angle, I use a shallow angle.
However, my personal preference is for razor + blade systems that favor a steep angle.