Many people have said that De Atramentis Haendel (or Handel) and De Atramentis Petrol are the same ink. Find my review of De Atramentis Petrol, here, and judge for yourself. To me, Petrol looks a bit less turquoise and more green. (Less blue and more grey, perhaps?)
This scan was done on an HP Deskjet F4280 at 600dpi.
Because these scans are done with a light emitting printer, actual
colors will, more likely than not, be slightly darker than they may
appear, here. The
colors shown, here, are probably a bit more reminiscent of what the ink
would be like under a bright light or if it were held up and viewed
with a light behind it.