I'd love to see these numbers too. My brain is kinda hazy this late, but I seem to remember from reading the TSW combat effects and proc posts that slow generates about 600 hate, while sloth generates 400 per.
Here is a classic post on testing hate generated by various means:
http://eqforums.station.sony.com/eq/boa ... e.id=18854
Using an SK to test aggro is a time-honored way, since we know exactly how much hate they generate, and can see exactly when the mob turns to them after aggroing someone else.