Recently got back from Lima where we tried the two top 50 places - Astrid y Gaston (14) and Central (50). Central was by far superior in all respects - food, decor and service. It truly was an exceptional meal. Astrid y Gaston was good, but absolutely nothing special. (Not even remotely in the company of Alinea, 15 on the list). The service was perfunctory, the food was just very good but not special, and the decor wasn't interesting.
In all fairness, we had the tasting menu at Central and ordered a la carte at Astrid. Most of the people at Astrid seemed to have the tasting menu and that seemed to be the better choice - probably dictating the kitchen's pacing and where it put its effort. Maybe the experience would have been different without the tasting menu at Central (although I doubt it). I'd rush back to Central in a heartbeat.
So - for anyone looking - I'd suggest Central as a first pick for dinner and advise getting the tasting menu at either place.