The
E5-2651 v2 is based on
Ivy Bridge architecture while the
4205U is based on
Whiskey Lake.
Using the multithread performance as a reference, the E5-2651 v2 gets a score of
415 k points while the 4205U gets
37.6 k points.
Summarizing, the
E5-2651 v2 is
11 times faster than the
4205U. To get a proper comparison between both models, take a look to the data shown below.