Narrow spots are excellent as spot lighting where better lights are too expensive or impractical. They also can be backed further from the stage without spilling light off of it, if placement is an issue. But be careful, if hung too close to the stage, their tiny angle of coverage can make them almost useless. Wide Flood Bulbs are very splashy and put out less lumens per square foot due to their wide dispersion. They are most useful in very closeup situations or where you'll be using just a few fixtures to cover a stage with light.
Lighter gels can help the wide flood bulbs cover more stage area effectively.
Unfortunately they are only for PAR 64s. I'm going to whip out my Photometrics Handbook and give you what are pretty reliable averages, based on GE lamps. These are field angles. For those of you who don't have the Photometric Handbook, by Robert C. Mumm, I highly recommend it. It provides data sheets for just about every standard lighting unit under the sun.