The newer colour is Ebisu.
Kuro is a flat black. Ebisy has shiny pearlescent flecks in it.
Impossible to phot the difference, it has to be seen with your eyes.
No need to recalibrate the speedo if you buy 18's with stock size tyres e.g 225/45 + 245/45
PS get rid of those vile 17's...................... 50 aspect ratio