If these are SOOC files, maybe he has adjusted the Camera Profile to accomplish the look. The Nikon D700 has 8 camera profiles available for use in the camera. The profiles are D2X Mode 1, D2X Mode 2, D2X Mode 3, Standard, Neutral, Portrait, Landscape, and Vivid - not all of these are already installed in the camera, but are available to load into the camera. You can also make adjustment to the Profiles in the camera. Adjustments available are Hue (-3, -2, -1, 0, +1, +2, +3), Contrast (-3, -2, -1, 0, +1, +2, +3, A), Saturation (-3, -2, -1, 0, +1, +2, +3, A), Brightness (-1, 0, +1), and Sharpness (0 through 9, A), where A is Automatic. You can also modify the Tone Curve using Picture Control Software and load these into the camera.
You can duplicate all of these in Lightroom or ACR. You duplicate Hue using the Primary Red, Green, and Blue Hue adjustments and set all three to eaual values. You can also do the same for Saturation by using the Primary Red, Green, and Blue Saturation adjustments by setting all three to the same value. Set Contrast by using custom curves. Set Brightness using Exposure and Sharpness using the sharpness settings.
What you don't have is profiles for your Canon camera with the Nikon look. You can generate these using the DNG Profile Editor, which is described in the "Adobe DNG Profile Editor Tutorial" PDF that is available on the Adobe Site (see Tutorial 2).
I have a D700 and tried the following using Nikon Capture NX2. I selected Portrait as the profile to use, set Hue to +2, Saturation to +1, and Contrast to +1. This appears to be in the right direction to duplicate what you want. I then tried this is Adobe Camera RAW (Photoshop CS6), selected Camera Portrait v4, set Primary Red, Green, and Blue Hue to +14, set Primary Red, Green, and Blue Saturation to +7, and selected Medium Curve for the Point curve instead of the Straight Line that is the default for ACR7.2. Try this in Lightroom with you Canon file using the Camera Portrait for the profile.