Why does the Kano PC use the intel atom x5-z8350 and not a more powerful processor like the intel celeron n4000?

Hello! I was wondering why the Kano PC uses a more than three year old intel atom processor instead of something like the intel celeron n4000? The intel celeron n4000 only costs a little more and I know it uses a little more power, but I’m sure a slightly better battery could compensate and the performance boost would probably be helpful. Any insights from the community or maybe from @chris would be helpful.