It depends on which look you prefer. I love the OBW's as I have made one with hexagons all together and it looked great, the second one I did, I didn't like the look of all the hex's together so I added triangles around them and it looked more like a Stack and Whack.
The first OBW book shows you both Hexagons and Octagons and the second is the hexagon with the 3d cubes.