In BR (& Latin), turns to the R (CW) are termed natural and turns to the L (CCW) are termed reverse. The reason the natural turn is easier to dance is due to the hold, where the lady is offset, somewhat, to the R. This is why there is no crossing of the feet in the forward (outside) turn action, whereas in the reverse turn the forward turn requires a foot crossing (just like the AT cruzada) in order to stay in the correct position in relation to partner.
As AT tends to have the follower directly in front of the leader, the same issue does not arise, and I would suggest that the CCW rotation in the giro is easier for the reasons already given: open side of the embrace/more room.
As AT tends to have the follower directly in front of the leader, the same issue does not arise, and I would suggest that the CCW rotation in the giro is easier for the reasons already given: open side of the embrace/more room.