Pretty sure many Compass pilots wouldn't have the "numbers" needed to be flying for DAL. (i.e. F/O's flight time, etc).
All FOs at Compass have ATP.
Many have 5000-10000 hours total time with very few having less than 2000TT.
I know of one who got hired with 25,000 TT which included 15,000 PIC.
I am curious, what were the Delta mins when they were hiring?