I read it the opposite way, that Cloth -1 means BETTER then Cloth, a -1 to hit.
Reason is that the CES in LBB4 Mercenary is a more expensive version of Cloth at higher tech with kind of a built-in chemsuit functionality.
Ambiguous, but then you go to Striker and Cloth is value 5 and CES is value 6.
I think it's pretty clear intent.