Range of motion? It will depend on what is measured.
Here is the rating criteria for the spine, you can also get rated for the numbness.
I too had a similar cervical injury with three surgeries (one initial, two revisions) and I was rated 10% on the spine based upon range of motion and 10% each arm for numbness.
With or without symptoms such as pain (whether or not it radiates), stiffness, or aching in the area of the spine affected by residuals of injury or disease
Unfavorable ankylosis of the entire spine.............................................................. 100
Unfavorable ankylosis of the entire thoracolumbar spine........................................ 50
Unfavorable ankylosis of the entire cervical spine; or, forward flexion of the thoracolumbar spine 30 degrees or less; or, favorable ankylosis of the entire thoracolumbar spine............................................................................. 40
Forward flexion of the cervical spine 15 degrees or less; or, favorable ankylosis of the entire cervical spine................................................................... 30
Forward flexion of the thoracolumbar spine greater than 30 degrees but not greater than 60 degrees; or, forward flexion of the cervical spine greater than 15 degrees but not greater than 30 degrees; or, the combined range of motion of the thoracolumbar spine not greater than 120 degrees; or, the combined range of motion of the cervical spine not greater than 170 degrees; or, muscle spasm or guarding severe enough to result in an abnormal gait or abnormal spinal contour such as scoliosis, reversed lordosis, or abnormal kyphosis............................................................................................... 20
Forward flexion of the thoracolumbar spine greater than 60 degrees but not greater than 85 degrees; or, forward flexion of the cervical spine greater than 30 degrees but not greater than 40 degrees; or, combined range of motion of the thoracolumbar spine greater than 120 degrees but not greater than 235 degrees; or, combined range of motion of the cervical spine greater than 170 degrees but not greater than 335 degrees; or, muscle spasm, guarding, or localized tenderness not resulting in abnormal gait or abnormal spinal contour; or, vertebral body fracture with loss of 50 percent or more of the height.................................................................................................................... 10