Ground isolation, protected inputs/outputs, FET switches - really, everything was thought of to make it as compatible as possible with as many machines as possible. But, it doesn’t have many of the same protections against the hostile electrical environment inside a cheap CO2 laser. The Smoothieboard (and the MKS/SKR, for that matter) was designed largely for 3d printers and CNC routers, with laser support tacked on because it was “easy” to support in software. It has protections and conveniences that you won’t find on a stock Smoothieboard. The Laserboard has some custom features and optimizations intended purely for laser use, taking Ray’s years of experience with these machines into account. He stands behind his product and takes the time to assist folks with problems - personally - here on the forum.
The Laserboard is also based on the Smoothieboard, but unlike the Chinese companies, Ray gives credit where credit is due and contributes back upstream. The SKR and MKS are cheap, poorly-implemented, mostly-unsupported rip-offs of the Smoothieboard, and don’t have the same more powerful hardware that the Laserboard offers.
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