'ergo' and 'anatomic' are variations on the same thing...a flat(ish) section just below the brake levers where your hand is supposed to go when in the drops. some folks love them, some don't (what if i want my hands 1/2" higher, or lower?). i fall into the latter camp.

'wing' bars have a flattened top section (between the levers and the stem)...wider = more comfy. dweebs will argue more aero.

personally, give me a deep drop road bar. hard-coded ergo (sharp transitions, a la easton), no thanks. but a more sedate ergo can work. my current fave is the oval concepts R900/950.