The sapphire edition of the HTC U Ultra will sell in Europe for €849

Despite what many analysts believed, HTC managed to launch the U Ultra with sapphire screen earlier than they have expected. The smartphone will be available for purchase in Germany and Switzerland on April 18, and it will cost no less than €849 outright.
That's the main reason the smartphone cost so much more than the HTC U Ultra with Corning Gorilla Glass 5 that's currently available in Europe for €699.

Aside from the larger amount of internal memory and the exceptionally strong display, there are no differences between the 64GB and 128GB HTC U Ultra models.
Customers who really want the sapphire edition of the HTC U Ultra can already pre-order the smartphone in Germany and Switzerland. There's a high chance that HTC's premium phone will be launched in other European countries following the announcement in Germany.
source: Winfuture.de (translated)
Things that are NOT allowed: