What is the difference between SQL SERVER CONTAINSTABLE & FREETEXTTABLE?

CONTAINSTABLE

Returns a table of zero, one, or more rows for those columns containing character-based data types for precise or fuzzy (less precise) matches to single words and phrases, the proximity of words within a certain distance of one another, or weighted matches. CONTAINSTABLE can be referenced in the FROM clause of a SELECT statement as if it were a regular table name.

Queries using CONTAINSTABLE specify contains-type full-text queries that return a relevance ranking value (RANK) and full-text key (KEY) for each row. The CONTAINSTABLE function uses the same search conditions as the CONTAINS predicate.

For more information see: http://msdn.microsoft.com/en-us/library/ms189760(v=SQL.90).aspx 

FREETEXTTABLE

Returns a table of zero, one, or more rows for those columns containing character-based data types for values that match the meaning, but not the exact wording, of the text in the specified freetext_string. FREETEXTTABLE can be referenced in the FROM clause of a SELECT statement like a regular table name.

Queries using FREETEXTTABLE specify free text-type full-text queries that return a relevance ranking value (RANK) and full-text key (KEY) for each row. 

For more information see: http://msdn.microsoft.com/en-us/library/ms177652(v=SQL.90).aspx