Yes it is the same one.
I don't think he's very clothes conscious and is prepared to wear the stuff from the shows he is in out in public later. I guess they are made for him so why not? He wore his suit from DM later in public. I think it is very sensible but I cannot see an American actor doing it!! Do they?
Not sure if people were pleased or horrified that Kate's (Duchess of Cambridge) mother wore Kate's hand-me-downs. I thought it was very sensible.
When I saw him wearing the cardigan I was reminded of a comment he made about his character in The Town (or a Mother's Son) about how his character was so conventional, wearing his "tragic" cardigan. (I think I'm not making this up -- that he actually said this.) Of course, maybe a cardigan is less tragic if it's worn over a tee-shirt as opposed to a button down.