I've done a version of the P7 with extended topsides for rack tube arrangement, and went and revived my designs for the P8 from a while ago.
It's based on the P7 - same sort of flat bottom, vertical topsides shape, but with a longer bow, wide point of the chines moved aft, and a wider transom.
So in fact similar to the E5 in plan view, more rocker in elevation, more boxy/less V fwd.