Some responses have been edited for brevity. In some ways wild canid pups mature a little faster, in terms of physical coordination. Mentally wolves may take a little longer to fully mature than dogs of equal size. I have watched Alaskan Malamutes, Siberian Huskies and other northern breeds mature, and found they are a little more clumsy at an early age than wolf pups, malamutes in particular. This may be due to their heavier bone.
Siberian pups are a little more physically adept at an early age than wolf pups.
The Inuit dog pups I raised were a little more wolflike in their early shyness and strong reactions toward novel stimuli. In terms of critical periods, however, dogs have an expanded window of opportunity to begin socialization to any creature or situation. At Wolf Park we begin at 10-14 days, as the eyes open. The wolf pups receive little to no contact with adult canids during this time - from about 2 weeks of age until 6 weeks of age. After that time until about 4 months of age, only limited contact with adult wolves is allowed.