Different.... Airtran would have been damaging to NWA, where Midwest was reasonably small and expensive. Airtran was already in Delta's parking lot destroying yields to any market that would "compete" on. SWA was viewed as a forgone conclusion in ATL by Delta, taking out Airtran in the process actually was probably BETTER for Delta than having SWA war it out with Airtran in ATL.
Airtran had already been reducing frequencies in ATL since shortly after DAL exited BK. The SWA acquisition just increased the rate and amount of that reduction in frequencies.