My projectors give a more focused/directional light beam than the stock. The stock seem brighter because they have a broad beam and give more light near the front sides of the car. The projectors 'project' their beam directly in front with less coverage area around the sides of the car but are definitely brighter in front. I wish the projectors I have would have used the refector style headlight like the stock HL's to reflect/project the beam instead of using a plastic cover to cut some of the harsh brightness out, which also causes those lines __/....__/ to appear in your beam.
Overall, I like the look of the projectors than the lighting they provide, which isn't bad but could be better.
SilverStars are just brighter than stock bulbs that cost around $40-50 bucks a pair.
They also make your light beam whiter. The draw back is that they are rated to only last about a year. My projectors seem better with the SilverStars.