100% kaneshin for me. Wazakura is a brand that draws on the expertise of different manufacturers, but kaneshin makes their own tools (mostly). Cost for quality you almost cannot beat kaneshin.
Either one is fine. Not to be an asshole but here goes—There are no really significant differences that someone asking this question would really notice. Both are quality-I have both. Happy with both. Price point for the Wazakura can sometimes be a bit lower than Kaneshin