Both models
4417U and
4415U are based on
Kaby Lake architecture.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the 4417U gets a score of
41.1 k points while the 4415U gets
56.4 k points.
Summarizing, the
4415U is
1.4 times faster than the
4417U. To get a proper comparison between both models, take a look to the data shown below.