I've tried Madake. I do find it's tougher like Roy mentions. Seems that it is harder and the nodes are spaced farther apart than moso.
The only problem I've seen with it is the diameter. If you don't build bows above 1 3/8" wide it shouldn't be a problem, but you'll have trouble getting 1.5" or wider.
I never knew HD had bamboo slats until now. I'll just mention that the 2" wide planks are better for bow making. Not that you normally need wider than 1.75", the 2" ones are flatter and give you more room to layout your profile and follow the crown of the boo.
I've used the 1.75" and they work fine for the most part; I'm just to the point where I want the best I can get and just one failure isn't worth saving a $1 or $2 per backing.
If you only plan to build a couple bows a year, you are better off getting them from Echo. You are getting hand picked slats suitable for bow making. If you order 20 slats, you'll more than likely have 5 of them not suitable for backings. So $5/backing is more like $7/backing.