Earlier quoted context omitted.
More powerful language (primitives, concision, macros), more performance (JVM fun-ness). Some aspects of the JVM (slow-start) are icky but the tooling works around it (in-runtime auto-reload without restarting the JVM). I'm a grumpy old CL'er so I was waiting for something like Clojure to come along anyway.
tx, but I meant the toolset and ecosystem, not the language features. popular frameworks, libs, out of the box solutions, opensource community, etc. - is clojure rich in this matter?
There's an excellent SQL abstraction library (Korma), Ring makes for a nice WSGI equivalent, Compojure and Clabango combined give you a Flask'ish experience, and there are a goodly number of Forms and validation libraries.
Some like to use CLJS on the frontend. There are libraries out there for making that nice.
I usually use vanilla jQuery or Angular on the frontend, no CLJS.
You need get more specific with your queries, I'm not going to write a novel at the merest hint.