Not who you asked, but I like and own both, but have found myself moving to Obsidian more and more. I'm not entirely sure why. IA writer now has document linking and I love the typography. I like the editor better.

I think there is something that makes file organization easier in Obsidian. I have a plugin that creates a new note for each given week. And it feels easier to navigate a bunch of files without the descriptions/first few lines of the doc.

EDIT: And this thread has encouraged me to second guess myself about some of these things and there's a setting to remove descriptions in the library. Maybe I'll try picking IA Writer back up!