I can also confirm: there is no changes in editor, but something goes wrong in multiplayer.
Mk-I and Spar-17 need 2-4 shots in chest to kill a non-armored player.
Another strange moment: I've bought the special vest (armor tier II) for test and was killed multiple times by Mk18 snipers with one shot in chest. In editor it takes 3 shots in chest by Mk18 to kill a guy in special vest. Please check it out.