Honestly i did not apply any salary/cap calculator program to him, i have read in the first message that
he has still 4 remaining pops until fully-capped.
With respect to defensive skills, ID is fundamental and primary skill for inner-defence.
Though SB plays an important role at inner-defence, it comes secondary and have a comlementary nature.
So difference between 16 ID and 14 ID is of great importance, certainly more significant than difference between 12 SB and 14 SB, and also the former skill contributes to defensive efficiency more.