These are my first raised heel skates in a long time. The soul plate is higher in the back to allow for a flat UFS mounting area. With skates like the Razors Shift or the Seba CJ, the boot is already flat. This allows for the addition of a shock absorber in the heel, typically making a more comfortable ride.
The Seba CJ Skates are some of the most expensive on the market. With a carbon fiber boot and integrated liner with memory foam, they're some of the most technically advanced skates I've seen. I skated them for a few months with different frame and wheel setups to see if they're worth your money.
These are very my first set of triskates. Riding three big wheels keeps your wheel base shorter making the skates more maneuverable. A comparable wheelbase with four wheels would max out around 80mm. These Pleasure Tool frames also have the middle wheel shifted, which helps with turns and coasting.
The hallmark feature of the Razors Shift is the new Instant Frame Change system. The base is a two part system, the soul and the slider. By pressing the two IFC buttons, you can remove the slider and then the soul plate.