myCNC-ET6 board contains
- 6 axes pulse-dir (3MHz)
- 8 galvanic isolated inputs (2 groups of 4 inputs with separate supply to use PNP and NPN sensors)
- 2 relay outputs
- 2 open collector outputs
- 3 PWM open collector outputs
- RS485 modbus
- 10V DAC output


It seems kflop does NOT have any galvanic isolation, relays, transistor outputs for IO.
I mean If you need to build similar MINIMAL system with kflop you need to add their IO board ($199).
A set will be more expensive, than ET6 kit (ET6 + Computer).

I don't tell all our boards are cheaper. But looks like we offer more affordable entry-level solution.

Keep in mind we offer Ethernet controllers, not USB. It can be important for industrial applications.