I'm a fan of dev.to as well as a writer. But, it's totally focused on development related things.
The super power that I see on medium.com is that it allows any topic to be published user-wise or publication-wise.
Dev.to doesn't allow us to create our own publication and make a community for a business which medium.com allows.
I'm totally in love with "publications" on medium which allows us to grow a "brand name".
But, I think reading and writing should be free :)