Velocity Yellow is a tintcoat so has a lot of depth, but not metallic. The name Velocity Yellow will remain (at least that is what we have been told so far. ). The color "tone" is only going to very slightly change, perhaps just a couple percent. There will be a touch less orange tone to the new yellow, and thus the new VY will be fractionally brighter and "purer." From twenty feet away, most will not be able to tell the difference. The only public "display" of the color so far has been the C7.R's -- which got the new panels back before the Daytona race.
Contrary to what has been posted elsewhere, neither the C7.R, nor the Z06 which appeared at The NAIAS 1.13.14 Reveal, sported the new yellow. The panels on the C7.R which was at NAIAS a were changed between then and the Daytona Race two weeks later.
Were are hopeful we will see the new VY at next weeks Bash, but that is not confirmed.