There are actually 3 out now. The purple is middle ground. Has less than the last one but lots more than the lowest one. The cheapest one is made for the mass retailers to sell. Trust me, if you look at all the items with prices beside of them, those are the cost of the added items, add those up and compare it too the cheapest one and you'll see that you more than get your money's worth buy buying the higher cost one. They all do the same thing and you can buy all of the stuff that goes with them but would spend more buying the extras for the cheapest one.