Are they heavier than Murray's? I've generally thought Novak to be more of the aggressor of the two, with Murray a bit more passive (though they both are great defensive players). However, when Andy really goes for it, it seems his groundstrokes, and especially forehand, are more penetrative...? Slapshot almost. Novak's forehands (and backhands) seemed to be laced with a bit more topspin so that's why they seem to bounce a bit higher but are less penetrating compared to Andy's when Andy really goes for it. Or am I imagining this because Murray usually plays more passively?