Picture # 1 is simply a bit more exposed* than picture # 2, that's why you get some more detail. That's definitely a small point in the iPhone's favor, but the difference isn't such that it really impacts the picture's quality, I suspect you could throw #2 into picasa and the "I'm feeling lucky" button would give you all the same detail in the tire marks simply by brightening up the picture overall. When the picture is very underexposed, that's when you really start to lose detail.
What really jumps out to me though, is all the noise that the flares create in the iPhone pic. There are red streaks in the concrete several feet to the left of the flares and significantly more glare directly around the flares. Speaking from a technical standpoint, those are flaws in the image that aren't easily fixed. By that I mean that, if you put aside any personal or artistic preference, or whether or not you prefer the look of the picture with the extra glare, the camera in picture #1 failed to accurately capture image data in areas in which the camera that took picture #2 succeeded in capturing image data accurately.
Obviously that's just one picture, and there may be a million other images that the iPhone captures better than the Evo. Working with photos and camers taught me that every single image is unique, and even pictures taken side by side within a few minute's timespan may come out different. But if you want an answer as to which is better between these two picures, I'll go with picture #2
*I suppose the term "exposed" isn't really relevant these days, but I learned to shoot while working in an old school camera store back in the day, so I'm sticking with the old-school terminology