COMPARE COLS COMPILE
COMPARE ( str-ptr1 str-len1 str-ptr2 str-len2 -- n )  
ansi 17.6.1.0935 <STRING>
compare both str-buffers, return 0 if they are equal, -1 if lower or shorter, and 1 if greater or longer

reference: p4_compare in ../src/string.c:0108, export CO COMPARE