Very interesting, you have to let us know how it turns out. Some of the old domestic machines were capable of similar speeds; Elna Supermatic 1300 spm, A pfaff 360 is set to maximum 2200 spm. Will you ever dare to floor the pedal? ;- ) My guess is your new machine will be supersmooth to run at these speeds and you have to let us know its' advantages.
Industrial is a loose term, depending a lot upon the size, durability and the marked it aims for. Heavy duty industrials run nearly for ever and will keep on running 80 years later. I know the 31K15 were aimed at small buisnesses like taylors and department store fitting room workers and not the larger factories. It runs and stiches reliable at 2000 stitches per minute. It was a much more expensive machine to invest in than the Janome model is today. The new Janome is much more portable, compact with built in light, auto threading, doesn't weigh nearly as much, etc. The odd thing with these high speed straight stitchers is, I personally only floor the pedal on my machines for easy zigzagging.