Is a bridge defense easier if the values are about equally distributed?
Having the defensive values split between the hands is better for the defense for the same reason as declarer, but the advantage is not as strong for defenders as for declarers. This is because defenders are more likely to choose the wrong suit to work on as they have less information about their combined strength, and less coordination. For example, it's more difficult for one defender to lead clubs and the other defender to switch to spades to get the entry to partner's hand, than it is for declarer to lead up to dummy's clubs, and then switch to a spade to get back to declarer's hand.