To get the apples to apples comparisons you need to run an x64 build on Windows 7 x64 w/ the commandnline: 'mame64 dolphin -bench 90' for example. The bench argument runs the emulated amount of the first XX seconds w/ certain other features turned off. You can use MameUI but it doesn't output to console so you'd need to redirect to a file.
The nvram that RB is talking about is for SCUD Race and Gradius IV. They need to be 'setup' before the benchmark run by going into their F2 menus.