Good, dedicated (and disposable) atomizers, such as the Joyetech 510, Empire Mods, or Cisco-spec or HH357, are IMO much better than most RDAs for flavor. You're dripping a very few drops of fresh liquid directly down onto either a bridge above the the coil which feeds it, or better yet, onto the coil itself (bridge-free). They have a very small volume and air is fed up around the coil from below, straight up from the 510 connector, past the coil, and through the drip tip. They are the pure essence of dripping, but you necessarily drip more frequently.
IMO, most RDAs are for cloud blowers, especially the dual and quad coil capable. Their volume is typically greater to allow for two or even three screw posts and multiple coils, which all interfere with air flow, especially when it comes in from the side(s) of the cap. They have much greater thermal mass, sucking the heat out of the vape more when cold, and contributing more to it when hot, so they're usually more inconsistent. The coil is usually not directly below the drip tip, and they depend on wicking, typically from a pool in the base, and they're sometimes stuffed with flavor killing wick. All this excess liquid is cooked before it ever gets to the coil to become vapor, but you get more of it between drippings.
Although I don't expect it to give the exact same experience as a disposable dripping atomizer, I have hope for using my on-order Sophia RBA for direct dripping, by leaving the juice feed closed, using it without a tank, and trimming the wick up to the sides of the ceramic cup.