lol, 1 is 6700K and the other is 10000K.
The 6700K contains more red peaks than the 10000K. The 6700K appears more yellow to the eye than 10000K.
I have used 6700K, 10000K, and a combo of both... I saw no noticeable difference in plant health/growth. I now use 10000K exclusively, because I like they way it looks better.