Principal is higher. The position is more like a manager type of consultant. They are very in-depth with the technology, but now more then not, manage the seniors or provide guidance to the seniors....
Consultant.
Here is a definition that I recently created for a Search Engine Optimized financial glossary:
A consultant is an individual or firm that offers expert advice or provides a...
A Presales consultant is normally an IT person that works with a sales person to explain the more detailed aspects of a solution to a customer, so a sale can be made. They would be experts in a...
A telecommunication consultant is a fancy name for a telemarketer. A telemarketer or telecommunication consultant is someone who markets over the phone, calling people at work or in their homes on...