I have/use a draco vision, and it runs a remarkable amount of rtg amiga software etc.It uses real 3.1 roms and works with a real workbench 3.1(i have 3.9 installed on it currently).
They actually built custom version of the amiga (vlab,retina z3,tocatta)boards that use the dracobus,which is fatser than Zorro3.CPU board(named eltannin iirc)has the 68060,3.1 roms,and other stuff on it,its the size of a zorrocard. and the retina is called Atlaise.
Close or not its a remarkable amount of engineering.
sadly the draco cubes came out originally here in the usa at $15000.luckily i got mine cheap from a friend.Support was always horrible from macrosystems and many needed chip upgrades to work right,some bad solder joints(the one i got originally had a small oak stick pushing on a card for it to operate reliable lol.
It does operate well,i still have a old movie on the harddrive i pulled in and never did edit or mess with it.. heh
One of the amiga mags had a great review of the draco cube.. here:
http://amr.abime.net/issue_2867_pages <-page 40 on....
mike
