The
i5-1235U is based on
Alder Lake architecture while the
E5-2651 v2 is based on
Ivy Bridge.
Using the multithread performance as a reference, the i5-1235U gets a score of
301.6 k points while the E5-2651 v2 gets
426.2 k points.
Summarizing, the
E5-2651 v2 is
1.4 times faster than the
i5-1235U. To get a proper comparison between both models, take a look to the data shown below.