I just recently bought the Denise's and it only goes to a 5.
I also bought the Boye at Michaels with the 40% off coupon because I wasn't sure I liked the Denise at first.
All I can say is I'm tending to use the Boye more for some reason. You have to make sure you use that little rubber round thing to tighten when you put the needles on or they tend to come apart. But if you actually follow directions (my weakness), they don't come apart.
So I'm no help at all - both are fine. I wanted the smaller sizes tho.