Originally Posted by
dsauch
Does anyone know if I have an itrn with two people, one E+ and other GM, will I be able to select seats in advance for both?
No, SU allows pre-selecting a seat only for bookings made in T+ fare buckets regardless of your status with them or other *S carriers.
The only advantage they give to the top tier card holders is waiving a fee for exit seats selection (aka Comfort+ seats) on their long hauls.