I don't know what you mean by "similar," but both the creation of trademarks and the creation of a remedy for trademark dilution are both part of the Trademark Act of 1946 (aka Title 15, Chapter 22, of the United States Code). Registration of trademarks is Sec. 1051, and the prohibition of dilution is in Sec. 1125. Your statement here is at best incoherent, and at worst simply incorrect. See generally http://www.fda.gov/opacom/laws/trademrk.htm
The way I see it, trademark dilution law is one part of trademark law, but it is a part that is more restrictive on freedom of speech than the rest. I think that's the point Anthony was trying to make.