The
906EC is based on
Coffee Lake architecture while the
Z1 Extreme is based on
Zen 4.
Using the multithread performance as a reference, the 906EC gets a score of
494.2 k points while the Z1 Extreme gets
553.4 k points.
Summarizing, the
Z1 Extreme is
1.1 times faster than the
906EC. To get a proper comparison between both models, take a look to the data shown below.