It's inferior only in the sense that there are fewer customization options and you can't patch it like a Kobo. OTOH Kindles have some features Kobos don't have, like global search and the option to sync non-Amazon books across apps and devices. I have several Kindles and a Kobo and I like both. Each has something the other hasn't. I wouldn't say either one is inferior.
JSWolf has a different opinion, but he has always been rabidly anti-Kindle.
