Сравнение двух строк

(string= "Marx" "Marx")
; T
(string= "Marx" "marx")
; NIL
(string-equal "Marx" "marx")
; T
(string< "Groucho" "Zeppo")
; 0
(string< "groucho" "Zeppo")
; NIL
(string-lessp "groucho" "Zeppo")
; 0
(mismatch "Harpo Marx" "Zeppo Marx" :from-end t :test #'char=)
; 3