The first difference is that we make each model for three different sports. Long track ice, short track ice and inline. Each of them has a different boot height, constructed with varying mounts of different materials, with different mounting blocks and stiffness. We wouldn’t advise you try to use a long track boot for inline because it is too soft. The boot is made with a lot more thermo plastic so long track skaters can steer the boot. The construction is totally different to an inline boot. The Vaypor is constructed to minimize weight and maximize strength. We use a special thermo set resin and the entire boot is made with carbon. We also use uni-directional carbon which saves even more weight. The package skates use the highest grade components like Jesa Swiss Steel bearings. The Z is a carbon boot but it uses some fiberglass layers. The stiffness is similar to that of the Vaypor but it weighs a little more.  The Jet uses a mix of fiberglass and carbon for the base. It is still super moldable thanks to our Super mold Technology and it is a lot lighter than some competitors top of the range boots, but it is heavier than our Vaypor and Z. If you are just getting into the sport, you won’t notice the difference. The resin is also slightly heavier than the Vaypor.