The obvious difference is that LFE is maintained by Robert Virding (one of the original creators of Erlang itself). I'd imagine this would translate to LFE being more "Erlangy", but this assumption comes from a lack of experience with either.
Second comment: LFE is a Lisp, but it's a Lisp whose first and foremost goal was to allow one to build fully Erlang (and OTP)-compatible systems in Lisp. Clojure's Lisp has a Java flavour; LFE's Lisp has an Erlang flavour. They are both very real and compelling Lisps :-)