These are sections around the fontana di trevi from 6 different maps, the first two free paper maps (sections scanned at 300dpi); the second two 'canned' online maps; the last two generated online maps. A comparison will follow, but you will probably draw your own conclusions already.
(1) Official map
(2) Photo express map
(3) Romebuddy map
(4) Alfanet map
(5) Mappy map (closest zoom)
(6) Yahoo map (closest zoom)