I'm just wondering, based on what we've seen, whether the Atlantis Ancients were in some way less powerful than the final non-ascended forms of the Milky Way Ancients. Apart from the difference in technology appearance, the Pegasus Ancients appear to use directed energy weapons, the squid-of-death, and thats about it. They still had Atlantis as their main base and PJ's as their main transport/exploration ship even though both were millions of years old by the time the final battle with the Wraith came. They also had to research ascension.
As opposed to the Milky Way Ancients, who have trans-galatic comm tech, galaxy destroying tech (Dakara, albeit with Stargate assistance), as well as more plentiful ZPM's, and more powerful weapons (Atlantis defence, squid swarm, the same defence was considered adequete for a Mily Way outpost, and a Ancient designed weapon devastated an entire planet by misfiring.) Additionally, the Milky Way Ancients created the headgrabber information download device, which appears totally unknown to the Pegasus Ancients.