I suppose since the point is to get something more reliable, it makes more sense to go for the known reliable manufacturer.
In my case, I think I'll just stash the old rectifier somewhere in the bike in case of emergency and install a voltmeter.
I've heard some people suggest that it's probably not a MOSFET rectifier, which would mean they're outright lying about it. But that should be pretty easier to figure out -- it should run much cooler. My current one was 145 degrees F after an hour.
I think it should work with any three phase stator, which I believe is most bikes.