This deal is more about developing Indigenous capabilities in Submarine construction since PSUs failed. Its less about which foreign company wins the tender and more who will get contract and develop capabilities, Is it L&T or MdL?
No matter what country's submarine we get it will be wasted in potential, overspent in budget if the govt shipyards had monopoly on it. At any point in future one need to give it to L&T since they had to start at some point from zero.