I just upgraded from a 60D to a 6D. I haven't used a 7D, so do take that into account. Although since the sensor is about the same between the 60D and 7D, that part should be safe for me to compare.
First sharpness: I don't see any sharpness issues in your images. Also remember that sharpness is affected by lighting, contrast, depth of field, and motion blur. I think people tend to obsess over sharpness more than needed - great photos have awesome lighting and composition and tell a story or relay an emotion - and that comes from photographic skill and not sharpness. Having said that the resolving power of a full frame is much better - you will capture more fine details on a full-frame.
Noise: The 6D is about 1.5 to 2 stops better than the 60D. I find I can shoot at ISO 3200 and get results that look as good as ISO 800 on the 60D. And ISO 400 is just as good as ISO 100 on the 60D - which means I can shoot at ISO 400, and set my shutter speed 2 stops faster - which is great for action shots. Also when I say 2-stops better that's comparing the amount of noise I see in RAW files. However the real world advantage is actually a little better since with more detail you can apply more NR and still keep the minimum required detail for most applications.
AF: I'm finding the AF on the 6D to be very good, it's at least as fast as the 60D to lock focus, and clearly faster in low light. However my understanding is that the 7D has a great AF system for tracking moving subjects which are off center. So if you are finding you use the tracking AF a lot, and/or are using the points far from the center of the frame, you may want to keep the 7D for that. I find that with tuning, you can make the 6D's tracking fairly good, however you have to keep your subject near the center of the frame.
Speed and fps: The speed in terms of shutter lag, focus lock time, play back, ect. are all great. In terms of fps well it's slower than other cameras, the 7D should get almost twice as many frames if you shoot in burst mode.
Build quality: The 7D is a tank, just check out some of the DigitalRev videos on it. However, I'm quite pleased with my 6D's build quality, I can't see having any problems with it lasting for years.
Do I miss the crop sensor, not at all. However I don't shoot at the far end of my lenses very much. If you are often shooting at 200mm, and find that's not long enough, than the 7D will give you a small advantage there in terms of pixel density. However if you just take your 6D file and crop it, you'll get fairly close to the same result. And you get the advantage of having the 70mm giving a 70mm FOV, which could be useful depending on how you shoot.
Bottom line: Yes, the IQ in terms of noise and detail resolution is better on the 6D. The AF is fast, but keep in mind the spread is limited. I can work with the limited spread with limited "focus-and-recompose", but you'll have to consider how/what you shoot, and see if you could work with it or not.