I don't think there are differences in North American models except the obvious (the unspeakable mph speedo on US cars for example). Your safest bet is to call them and ask. Check out their website for info, they're active.
yeah, v bands can be used instead of flange and bolt. What's your question? Why not email them and ask them your questions if their product description is vague.
As far as quality, idk, never seen them, never heard of them. Have them send some pictures of the actual product where you can see the welds, the thickness of the flanges etc. Ask what grade materials they use. stuff like that.