How does the steady state theory of the universe differ from the Big Bang theory?

a
The steady state theory claims that faster-than-light travel is possible; the Big Bang theory claims it isn't.
b
The steady state theory puts the age of the universe at 4 million years; the Big Bang theory puts it at 5 million.
c
The steady state theory proposes that dark matter does not exist; the Big Bang theory proposes that it does.
d
The "steady state" universe may not have had a beginning; the "Big Bang" universe definitely did.