Please excuse my humble attempt at an illustration of sweep. The angles I've drawn are more for comparison than for actual numbers, which I can only guess at. The On-One Mary bars are a variation on the All-Rounder, an English bar that was also very popular on some of the more commuter-like bikes in Europe. In fact, they still are. They have less sweep than NR's and have a shorter straight section at the clamp. Hope this helps.
http://i15.tinypic.com/2rm39cw.jpg

The OP asks about the Ultimate Handlebar. Tough to say. There are some basics to use as a Go-By, tho. I do this, and it has worked fror me:

1) Stand with your arms relaxed at your sides
2) Look down and notice the natural pronation (twist) of your wrists.
3) Lift your arms to the approx position of your H'bar grips and notice that your wrists haven't changed their pronation.
4) Good, your are a human, not a chimp.
5) Match a set of bars to that approx postion and you will choose North Roads or Mary's. Like McD's - Billions and Billions sold.