Which is worse, a c6 or c7 injury to the spinal cord?

Spinal cord injury: Generally the lower in the spinal cord the better the better C7 leaves you with wrist extension and the abilty to work a joy stick on a mototorized wheel chair C6 involvement implies loss of wrist extention control initial levels can change as swelling subsides.

The one at the : Higher level in the spinal cord is always worse so in this case it would be C6 as it leads to less functional neural tissue.