While it is true
that most "grey" blossoms are just faded normal ones,
(and to check this, you can check if there are any differences
between the color of the body and the inside of the pony) I
still think some are genuine, as there are no colour discrepancies
nor fading visible.
Said this, I have
two different versions of Italian grey blossoms: one (11 flowers)
looks more like a "normal" italian pony (stamped eyes)
while the second (thinner flowers, and only 10 of them) has
hairbrushed eyes, and look similar to a Macau pony. Also, the
hair quality feels (and look!) slightly different.