Nikon dslr D5200 and D700?

I just want to know what's the difference between these two dslr. In specs, body parts, etc. And which one is better.

Here are the differences in the sensor sizes

http://cameraimagesensor.com/size/#29,25,a

And here is how their sensors perform

http://www.dxomark.com/...___850_441

They both use AF-S Nikkor lenses

Most pro photographers have one of each dSLR, an APS-C sensored camera like the D5200 and a full frame dSLR like the D700.

Which you choose is up to you. If you tend to shoot action, sports or wildlife, the D5200 (or D7100 a more robust version) will give you added reach with the same focal length lenses

This tool lists the differences between the two cameras.
http://snapsort.com/...Nikon_D700

Not surprisingly, the considerably more expensive camera, the D700, is the better camera.