Go with your gut. The higher resolution means that the text looks more like "real ink", but I'm not sure if this is a big deal for you. For me, the refresh rate is just fast enough that I don't notice it while I'm editing text.

One important thing to consider, which maybe I should have shared in the other post: I don't really enjoy using the mouse on the e-ink display, because of the refresh rate. It's doable, but noticeably choppy.

If using the mouse is important to you while you code, go for the faster refresh rate!

The lower resolution might actually be nice too since it might better match your other displays.