The
i5-6600K is based on
Skylake architecture while the
906ED 2.1GHz is based on
Comet Lake.
Using the multithread performance as a reference, the i5-6600K gets a score of
209.3 k points while the 906ED 2.1GHz gets
499.5 k points.
Summarizing, the
906ED 2.1GHz is
2.4 times faster than the
i5-6600K . To get a proper comparison between both models, take a look to the data shown below.