The
3580U Microsoft Surface (R) Edition is based on
Zen+ architecture while the
506E8 is based on
Kaby Lake.
Using the multithread performance as a reference, the 3580U Microsoft Surface (R) Edition gets a score of
174.2 k points while the 506E8 gets
211.6 k points.
Summarizing, the
506E8 is
1.2 times faster than the
3580U Microsoft Surface (R) Edition. To get a proper comparison between both models, take a look to the data shown below.