Speed: A winged skeleton can’t use its wings to fly. If the base creature flew magically, so can the skeleton. All other movement types are retained.
Speed: Winged zombies can still fly, but maneuverability drops to clumsy. If the base creature flew magically, so can the zombie. Retain all other movement types.
|That Crazy Alchemist|
Also note that they lose all special qualities. So any special qualities that involve movement would also be lost.
Ex. A zombie squid wouldn't be able to use its Jet movement because it's being provided by a special quality.
With you quickling example, he'd be able to retain the 120ft speed but not the blur effect.