Seat tube angle has already been well adressed, so here's my take on head tube angles.
Head tube angle does two things, together with rake it changes the amount of steering trail, and it affects the weight displacement between the front and rear wheels.
Trail is fairly well understood, in brief less trail will require less force to change directions, and more trail will require more force. High trail and low trail is not better or worse, it's just a personal preference, and can change based on speed, terrain, and load. All else being equal, and as long as the head tube angles are close (as they are here) bikes with the same trail will will handle the same.
Weight distribution I think is as important to handling as trail and is almost unrecognized. This is especially important to those of us carrying heavy loads on racks and in panniers. Assuming the rear wheel remains in the same place relative to the bottom bracket, moving the front wheel further out will reduce the amount of weight on it. This will make the steering feel light and vague regardless of the trail. Moving the wheel back in will make it feel very responsive, but also may require a significant amount of effort to turn. We have an advantge over other riders that we can change our weight distribution by moving our gear around. For me, I like to put as much weight in the front panniers as possible on most touring bikes in order to get the handling that I like. Others happily throw everything on the rear rack. Just like trail, it's not a better or worse thing, just a personal preference.
Sean