Jonathan_S wrote:That said, since those same sidewalls will eat up a missile's wedge without flinching the GL logically seems like it would be a stronger gravity phenomenon that that.
I don't think so.
I think it's very likely that a missile's drive (and the missile) would be destroyed crossing the wedge perimeter of the target starship. This is why laser-heads were developed, so that the warhead could detonate well outside the wedge of the target (30-50,000km compared to a wedge approx 100km across).
A wedge collision directly with sidewall (assuming the target had no wedge of its own) would go straight through the sidewall and cut the target in half. This would not be good for either ship as the catastrophic failure of the fusion bottles would effectively be a point-blank detonation of a multi-gigatonne bomb