No there isn't, but that certainly doesn't prevent you from making your own:
alias comparecs {
var %c = 1, %d = 1
while ($mid($1,%c,1) === $mid($2,%d,1) && $ifmatch) {
inc %c
inc %d
}
if ($mid($1,%c,1) === $mid($2,%d,1)) return $true
return $false
}
$comparecs(0098,98) = $false
$comparecs(test,TEST) = $false
$comparecs(test,test) = $true