Freelance consultants and independent consultants are the same thing. If you’re self-employed as a consultant, then you’re freelance. It’s redundant to put "freelance consultant" on your business cards, unless you’re deliberately looking to set yourself apart from consultants who work for larger consulting firms. However, if you’re looking to market yourself to a company, emphasizing the "freelance" part is only going to make them think they can hire you for less. Instead, put the emphasis on what you can do for the client, not your consulting fees.