Well yeah, the difference being that the Tormach version is $243 without shipping...each. These are made by the same company with the same specs, but lack the convenient plug- and cost $65 each. For guys like me who cant afford to shell out that much cash (in my case, almost a grand for all 3) then there is a lot of incentive there.
What we need is the proper pinout from the ribbon cable to the new (not sold under Tormach) drivers.