Boost vs Trim tabs: I just assumed that there were similar. Enlighten me, what's the diff?

I get the 6% to 10% and no more than 30' throw, but what surface unloading should I expect? I don't need an exact number, but what are we talking? 10%? 50%? What about extreme throws, such as 45 degrees. How well do the tabs work in that situation?

Thanks.