it all depends on the level of smoothness your leather exhibits. Some "leather back" dragons are very bumpy, some have all their side spikes, some have none, some have head/nape spikes, some do not.
i just picked up my 2nd leatherback, this one being a hypo...my first leather was a translucent and she has some side spikes..the new one looks like it barely has any side spikes...to me they are the coolest looking and they get better with every shed....definitely my new favorite..