I believe the D7000 does trump in speed of AF, but accuracy I am not so sure. Many people will vouch for the D7000 in AF, especially low-light. However, there have been some tests done that show the k-5 is more accurate if slower.
Again - the differences in the picture are far more than just camera. The subjects are different. The backgrounds are different. The lighting is different. The lenses are different. The post processing is different. The settings are different.
For example, to steal from the DA*55 photo thread:
I instantly believe this shot is far prettier than the three you have linked.