What is the difference between RETURNS `SETOF integer` and RETURNS TABLE(name int)`?

Given the two definitions below, is there any difference?

CREATE FUNCTION foo(OUT foobar int4)
RETURNS SETOF int4
AS 'MODULE_PATHNAME', 'foo'
LANGUAGE C STRICT VOLATILE;

And,

CREATE FUNCTION foo()
RETURNS TABLE(foobar int4)
AS 'MODULE_PATHNAME', 'foo'
LANGUAGE C STRICT VOLATILE;

That is to say is there a difference between the _"Result data type"_ as displayed with \df between * TABLE(foobar integer) * and, SETOF interger where the Argument data types includes OUT foobar integer