The most important distinction in a language is

whether it has GC or not.

>>31
Didn't On Lisp already feature a Prolog compiler built... On... Lisp? Anything done by the Racket project is as bloated as shit as they constantly expand everything to support twenty different variants of the language.

Besides that, Prolog is just a European Not-Invented-Here kneejerk response to the elegance of Lisp.
https://archive.org/stream/byte-magazine-1984-10/1984_10_BYTE_09-11_Databases#page/n377/mode/2up