[akandiah]

Benchmarks.

[jiggy2011]

I don't know what benchmark would give an unbiased comparison.

[iso-8859-1]

Build your own benchmark. Measure whatever you want to do. Or if you insist on standardized testing, use something like SPECInt 2006. Results here: http://www.spec.org/cpu2006/results/res2013q1/ (sadly no ARM results). Of course that is only for integer calculations, if you need fp, use SPECfp.

[jiggy2011]

There's nothing that you can really condense down into a couple of simple numbers to use in marketing to non technical people.