There is a review from Alan Sircom ( he owns Naim NAT01, when I remember right ) in the English HIFI+, he reviewed all MD and shortly before he listened to the MD 108, he reviewed the 106t.
He wrote the differences are not subtle, they are HUGE. He thought, the differences between 106t and 108 are small because the 106t is newer. He he was wrong, very wrong ( his words ), the MD 108 is much, much better sounding. A total different, better product. The difference is even much wider between 108 and 106t than the one between MD102t to MD106t. The smoothness and richness from the 108 is a class of it's own.
He writes, that the 108 is the best tuner in the world today.