I find this quite amusing, some others might too.
Left Side is taken from 'Curb Your Enthusiasm' Season 3 - Episode 1 'Chet's Shirt', Right Side is taken from 'The Sopranos' Season 5 - Episode 1 'The Two Tony’s'
It does seem strange though HBO are using the same Shirts in two series they have running, maybe not but it sort of makes them look stupid & un-original in the costumes they choose for their shows. I also do realize 'yes' Tony is wearing a short sleeve whereas Larry's is long but apart from that it’s the same shirt.
The first time I saw 'The Two Tony's' I immediately recognized the shirt, after a short time remembered the 'Curb Your Enthusiasm' episode Chet's Shirt (Tony's Shirt now
), sure enough they are both the same shirt.