Have you seen this other variety? Is it a weird Italianism?
I don't know, like I said this is the first time to see pipes on this style pocket.
There is a difference in construction between the Isaia and Rubinacci. The pipes on the Rubinacci have been pressed open making the pipes look equal thickness to the coat. Isaia has the pipes turned under making the pipe thinner and adds a bit of bulk above the pipe. This method is a short cut that bothers me but not others.
If you notice, Rubinacci sized the flap to match the exact width of the herringbone pattern. The flap starts and ends on the line of the herringbone. Something I would get all OCD about doing, so kudos to them.