The RBZ will be available in a junior, 1-5.5 in D & E. MAP will be $399.99 There are noticeable differences between the two besides the use of the surlyn in the rbz 100. The RBZ 100 will still be a great skate, comparable to other skates in that same range (most similarly, One.8, X90, 18K & 17K [can't comment on Grafs or Eastons). If money isn't an issue there are definite benefits jumping up to the RBZ, mainly stiffness and durability. The RBZ 100 is still plenty stiff though, and should hold up quite well.