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.
Satin Nickel has a slightly warmer, softer tone, while stainless steel offers a cooler, more modern look. Stainless steel is generally more resistant to scratches and fingerprints, making it a great choice for high-use areas.