As far as AIP goes , The IN has chosen the German Fuel Cells over French MESMA , An internal study of the IN came up with the conclusion that the German Fuel Cells were much superior to the French MESMA.

One never knows how urgent is this AIP requirement wheather they would incorporated with the first sub itself and would be fitted on a later one.

One thing about the French Scorpene is that all the command & control ,sensors sonar and weapons suite ,SUBTICS are made by France so it would be much easier to transfer the tech as part of the deal.

Also one grey area is what specification has the IN asked for , the Scorpene is a very customizable submarine and cost could vary depending on whats fitted and customised in the sub