Semantics. CL is extremely dynamic and has separate symbol namespaces, Scheme has more rigid types, Clojure has a lot of stuff built around immutability and rep

Semantics. CL is extremely dynamic and has separate symbol namespaces, Scheme has more rigid types, Clojure has a lot of stuff built around immutability and replaced the general use of lists with arrays, Fennel has lua types and semantics, Janet is very small and portable, and adds a lot of small nice things. Each of these feels completely different to program in, and it's mostly not about the standard library.