1. Copyright vs. trademark
Similarities and differences

2. Copyright
Copyright is a form of protection provided to the authors of "original works of authorship" including literary, dramatic, musical, artistic, and certain other intellectual works, both published and unpublished. The 1976 Copyright Act generally gives the owner of copyright the exclusive right to reproduce the copyrighted work, to prepare derivative works, to distribute copies of the copyrighted work, to perform the copyrighted work publicly, or to display the copyrighted work publicly.

3. Trademark
A trademark is a word, name, symbol or device which is used in trade with goods to indicate the source of the goods and to distinguish them from the goods of others. A servicemark is the same as a trademark except that it identifies and distinguishes the source of a service rather than a product. The terms "trademark" and "mark" are commonly used to refer to both trademarks and servicemarks.

4. Trademark
Trademark rights may be used to prevent others from using a confusingly similar mark, but not to prevent others from making the same goods or from selling the same goods or services under a clearly different mark.

5. Other differences…
The purpose of a copyright is to protect works of authorship as fixed in a tangible form of expression. Thus, copyright covers: a) works of art (2 or 3 dimensional), b) photos, pictures, graphic designs, drawings and other forms of images; c) songs, music and sound recordings of all kinds; d) books, manuscripts, publications and other written works; and e) plays, movies, shows, and other performance arts. The purpose of a trademark is to protect words, phrases and logos used in federally regulated commerce to identify the source of goods and/or services.

6. Differences…
There may be occasions when both copyright and trademark protection are desired with respect to the same business endeavor. For example, a marketing campaign for a new product may introduce a new slogan for use with the product, which also appears in advertisements for the product. However, copyright and trademark protection will cover different things. The advertisement's text and graphics, as published in a particular vehicle, will be covered by copyright - but this will not protect the slogan as such. The slogan may be protected by trademark law, but this will not cover the rest of the advertisement. If you want both forms of protection, you will have to perform both types of registration.

7. Differences…
If you are interested in protecting a title, slogan, or other short word phrase, generally you want a trademark. Copyright law does not protect a bare phrase, slogan, or trade name.
Whether an image should be protected by trademark or copyright law depends on whether its use is intended to identify the source of goods or services. If an image is used temporarily in an ad campaign, it generally is not the type of thing intended to be protected as a logo.
Copyright law provides for compulsory licensing and royalty payments - there is no analogous concept in trademark law. Plus, the tests and definition of infringement are considerably different under copyright law and trademark law.