I have never received money from either but have done extensive research on both. I can only echo what has been previously said, it depends on what stage your business is in. Hell, in SBA the money is there. I personally feel you need to know you are going to borrow it before you even know you want a business. Don't mind me, go to score.org and they may be of some assistance.
Now as far as angel investing goes, it is a much more intimate and personal process. You are dealing with people that are part investor part gambler and ALL game. If any one allows you to present, likes your presentation and tells you they want to follow up, it is usually serious and from what I hear, not much waiting. Power Point gotta' be tight though, you hear me? If you serious, check out this site gatheringofangels.com. I like how they do things.
That's my wooden nickel.