Speaking as someone who has been around the ACE team for a while I can say this. The ACE armor system is not up to par against Pro PE. It is much better than default ArmA 2, however it is not a competitor to Pro PE. The FCS they added is pretty good, but still not up to par against Pro PE. Over all, ACE 2 is a step up from ArmA 2, but Pro PE is a different animal.