IN will want to lease 4-5 aircrafts asap. Maybe by this year end only.The choice has to be made this year, 'cause they wanna expedite the R&D of the carrier.
As for numbers, assuming a 70% availability, we will need 40 SHs or 48 Rafales. Because the two-seat Rafales cannot be operated on carriers. So I think the price advantage belongs to the SH.