It's far too simplistic to call one car's suspension better than another's based solely on the macpherson strut vs. double wishbone distinction. Conceptually double-wishbone suspension is better, but what's vastly more important for everyone from weekend track enthusiasts to the lower levels of professional racing is specific design/execution/tuning.
Take a look at Tony Rivera's FR-S in Pirelli World Challenge. He destroyed the TCA field at Road America, but was slower in a straight line than his main competitor (RX-8 on double-wishbones). The reason for his dominance was purely in handling. Yes the reason for a macpherson strut car's dominance over its double-wishbone competition was due to handling. And we're talking about an almost showroom stock series (TCA PWC) where the double-wishbone car had the benefit of years of development over the strut car.
Quote from Rivera after the race:
Quote:
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We have a real reliable little Scion that is fun to drive. It’s fun whether you are by yourself or in a pack. It reminds us why we do this. Believe it or not, this is probably the best track for this car. Even though it is the slowest one in the straightaway. The big misconception here that this is a big horsepower track. And a low-horsepower car can make up a lot at this track just because the entry to all of the straightaways is so great, speedwise. If you have a car that is dialed in handling wise, you can make up for quite a bit. There aren’t really any ‘point and shoot sections’ in this track."
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Notice no mention of the inferior struts on his FR-S? And it's not like this was a fluke. Rivera's FR-S was making up time in the corners at Mid-Ohio as well.
This also matches my track experience with the FR-S. I've run down plenty of double-wishbone "magic cars" like the S2000 and RX-8 in corners. I've also been passed by some as well. From my experience, far more important than suspension type is tires and suspension tuning.
About tires, there are tests (other than the Tire Rack test) where the FR-S gained significant time switching from stock tires to max-performance category (MP). Over two seconds faster at Hockenheimring short. Huge time on the Nurburgring. A few other test have shown this as well, just need to search and read.