Normally exclusive and non-exclusive logos or designs are based on the amount you are paying for the work. Normally the more expensive logos are exclusive and

Normally exclusive and non-exclusive logos or designs are based on the amount you are paying for the work. Normally the more expensive logos are exclusive and in the contract the designer has a license to display the logo as the work they did for you along with a case study or summary of the client. A non exclusive would not be good for a business as the designer at any time could make small changes and then use that logo for other clients in a template format (You want original work). In which someone else that purchases services from them could them come after you for having a similar logo. It is all in the wording of the contract that you have to careful with. Normally all work by a contractor is owned in full by those paying for the work unless otherwise stated in black and white. If you need further guidance I recommend talking with a lawyer to insure a proper contract is created that is fair to you and any contractors that you may work with.