The Miche bb have adjustable cups, which is nice. But the cups also have a tendency to come loose, which is ****e. Mines loctited in now, and it's fine. But as long as you use a bb with the same taper, bb shell threading and spindle length, you'll be ok.

There isn't anything proprietary to the Miche drive train. The old ones had the chainring bolts thread into the spider, but that's been phased out.