Not from a language-theoretic standpoint. From a pragmatic standpoint, all standard-conforming Common Lisp code runs on a conformant implementation. Schemes of

Not from a language-theoretic standpoint. From a pragmatic standpoint, all standard-conforming Common Lisp code runs on a conformant implementation. Schemes often tend to diverge (and they have 6 different Rn standards). So I think CL is 'better' than Scheme, for that value of better.