I asked the same question about a month ago, with few responses.
I am moving forward with getting a 6284 and did try it out at my place for several days. A small diesel fuel leak developed on the lift pump , which is to be repaired.
The machine seemed pretty good, the short time I had it so far.
I think the engine is really a Perkins, who is owned by Cat.
I'll post when I get some more to report.
GrayBeard