[[SPOILER]] I don't think it's a fake Armani tag, it's just the name Giorgio - a pretty common Italian name. Usually fake Armani goes overboard with the Eagle. That's just a jacket made by a guy named Giorgio.
Basic is a fit of Tom Ford, it indicates a narrower lapel - usually notched. It's a more conservative cut, but still often found among the wild patterns of Tom Ford fabrics. The tags are right and the long 5th button hole is the Tom Ford house style when they finish the sleeves (for a while they were doing 3 sleeve buttons but the 3rd was still a longer hole and left unbuttoned).The suit is legit.