It has to be linked with the P75I. Even if the Amur is an evolution of the Kilo, it isn't the same, therefor commonality will be less and you don't buy just 2 x Amurs with different logistics and then go to order more Scorpenes or even something else. If they go for Amurs, they have to go for it in the P75I too, otherwise neither the logistics nor the possible benefits of cost or customization would play in favour for the deal. But again, the most logical and easy to induct solution would be additional Kilos, or Scorpenes delivered by Russia or France. No additional logistics, training or spares, since the earlier is already operational, while the other is now being set up anyway. So it would be very questionable to choose Amurs now, but then IN took a very questionable decision with Scorpenes too, so lets see.