Platform differences

From FaHWiki

CPU manufacturers advance their products in various ways, and as FAH is known to demand a lot from the computer, WU processing speeds will never be the same nor even comparable across the spectrum of the systems.

There is a reference machine on which all WU scores are calculated. Each WU from a specific project will always get the same amount of points. If your system is better than the reference machine then you'll score those points faster, and vice versa with a slower machine.
Note: Better is not in sence of PR talk - the same system can be slower on one set of tasks and quicker on another set of tasks.

Check: CPU "differences"

Reference Links