I also like having my writing in one spot. I do use Ulysses to send content to my site as the Obsidian plugin doesn’t do a great job.
If you’re interested in some of the features for writing check out the links to some videos I produced. If you’re happy with the two app still, use what works for you.
I did a walkthrough of the longform plugin here: Obsidian Longform Plugin - YouTube
I also did a video on plugins for writers: 9 Must Have Obsidian Writing Plugins - YouTube