I have an almost unused A&F Zoli/Rizzini 28b BLNE as well, and mine seems to be pretty well fit and finished, IMHO. I does utilize some apparent cost saving measures, it doesn't have a split bottom/trigger plate, it is all one piece, similar the the Ugartechea boxlocks. The barrels appear to be shoe lump construction. The tumblers and cocking limbs pivot on screws instead of pins, like the AYA boxlocks. Mine is similar to Owen's in that it does not seem to open quite far enough either, but mine is not really difficult to load, you just have to get used to it.
I have never handled the Extra Lusso, so I cannot offer an opinion on how they compare.