Well, sort of. A friend of mine bought a 2010 WRX five door, and while he liked the car, he regretted not buying the STi. So, on the weekend, he was at the dealer and impulse took over, and he bought an STi five door.
The dealer offered him about a nickel and some lint from the manager's pocket for his WRX, so he didn't bother trading. So, he has both. Comparision!!
We spent about an hour today just driving the cars back to back. Interesting, as the conditions were icy and snowy streets. Both cars are on performance snow tires.
The DCCD is pretty awesome, but if you don't plan on really using it, don't bother buying the STi. The WRX will suit most buyers. However, the diffs and ability to control them is huge when traction is limited. The WRX is set up for a bit of understeer, where the STi can be tuned to your liking. With a little tweaking, terrific four wheel full power drifts are easy and fun. The WRX can do it, but takes real work. Nice!!
The six speed is nice, but I didn't see any big advantage to the extra cog. The WRX's ratios are well chosen and the engine can be kept on the boost. But, if you're paying extra for the STi, the six speed is one thing you get. The clutch on the STi felt better, with a smoother engagement and more precise slow speed ability. The WRX could lurch just a teeny bit, the STi, not.
The hilarious thing was that the Forester could walk away from either of them on the icy street in front of my chum's house. The Forester's WS Blizzaks are noticeably better on the slick stuff, and the old gal's lower power is delivered low and linear. Okay, the WRX and the STi would have dusted most 2WD vehicles, but it was funny hauling ass away from an STi.
Seriously, I'd have a VERY hard time choosing between the WRX and STi. The price gap is closer, and so is the performance gap. The DCCD is simply incredible, and that alone seems to justify the price gap.