I've got it boiled down to these two units. Which his preferred?

I believe the Invertec STT is the same process as mig but can it do other processes?
KempoMIG is just a mig l believe.

Both are from a factory doing stainless at the moment. The Kemppi needs a hand piece assembly and the Lincoln is ready to go.
I've seen them both at work, asking is $1100 for either.

What is the forums opinion of these?