The end result is the same on both faux furled, and true furled leaders. The compound seamless taper of a true furled leader doesn't have any noticable advantage over a faux furled leader in the way they roll over. Both designs do a fabulous job, of that.
The downside, for either design, is that the body of the leader rolls as tension is put on it. To understand what I'm talking about just watch the knot, or stick a small tag of tape to the tippet end and begin to put tension on the leader....you'll see the knot (or the tape) begin to spin. The more tension you apply....the more it spins. This causes three main problems that can cause you headaches and outweight the awesome way that they turn over on a cast.
#1. Twisted tippet breaks easier.
#2. If you get snagged and have to break off, the immediate recoil of the leader when the tippet breaks, will cause the whole leader to ball up into a big mess, more times than not.
#3. Heavily weighted flys (like clousers, for example) will spin, or at the least they will roll over on their sides or upside down when stripped or worked against a fast current.
I know how awesome furled leaders cast compared to standard tapered mono leaders, but in my opinion the last thing you want to be using when the fish of a lifetime is hooked, is a furled leader.
I guess it depends on which is most important to you... catching fish...or looking good trying. LOL