ColdFusion 9 and 10 are licensed differently. CF9 was less restrictive than CF10 is with regard to processors and cores. Here are some good resources to explain the CPU/Core license differences:
CF10 EULA (particularly section 1.5): http://www.adobe.com/products/eulas/pdfs/adobe_coldfusion_mutli_201203 02_1201.pdf
Blog post from Adobe CF Product Manager: http://blogs.coldfusion.com/post.cfm/coldfusion-10-eula
And I got both of the above links, along with a better understanding/interpretation from this blog post by Tim Cunningham: http://cfmumbojumbo.com/cf/index.cfm/coding/coldfusion-10-eula-changes /
HTH,
-Carl V.