Clojure and by extension ClojureScript has a lot of tasteful and pragmatic design decisions, e.g. the use of the threading form and implicit lambda illustrated with the "+ 2").

By contrast Racket has been extended to include a Clojure-inspired threading as a library, showing off just a little of its awesome linguistic extensibility, leading in this case to ergonomically similar code.

Clojure/Script is a wonderful opinionated modern Lisp; Racket is a more linguistically extensible modern Lisp. There's considerable cross-fertilisation going on.

If you love Clojure, it's worth keeping an eye on Racket.

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You can spell λ out as lambda in Racket (and Scheme).