This measurement is called “projection” and can be found in the images on our product pages at our retailer partner websites. Generally, square shaped pulls will have wider projections for larger hands or knuckles. Here's an example for the solid bar pull.
The color of SpotShield brushed nickel is the same as our standard brushed nickel finish. The difference is in the coating: SpotShield is a protective layer that resists water spots, fingerprints, and everyday smudges, so your fixtures look cleaner for longer.