Booh! on 02 March 2011
To cut a long story short: both those Qur'an are not Uthmans Qur'an or copy of that Qur'an (if it ever existed). None of them was ever scientifically examined (wonder why). However the one in Turkey is at least from the 8th century ( http://www.islamic-awareness.org/Quran/Text/Mss/topkapi.html ), the same goes for the one in Tashkent ( http://www.islamic-awareness.org/Quran/Text/Mss/samarqand.html ).
The oldest Qur'an known is the one (very incomplete) in Sana'a, which is from ~710/720 CE.
