"There are, of course, differences between Micro.blog and rss.chat, but the intention behind both is very similar, isn't it?"
This app is holding the place for a protocol I want to be widely supported. It's also documented and there's even a validator for it. I want it to be easy to hook up other apps to the network this defines.
It's not my place to say what micro.blog is -- but the other day I called it: "the swiss army knife of interop in the web of the 2020's." And in that it is unique and imho irreplaceable.
I'm trying to create a new kind of network for discourse on the web, again the blog posts will tell you more about that.