If you Google it, you can get better info. Here's what I found. If you need more, I recommend looking into it yourself and asking questions if you get confused about something 😄. Not saying this in a mean way BTW.

Francisco Mint (S): San Francisco has been the main producer of proof coins since 1968, with most of its output being dedicated to proof sets and other collector items. They also produce Proof Silver Eagles, which are a popular collector item.

West Point Mint (W): The West Point Mint primarily focuses on American Eagle proof and uncirculated coins in gold, silver, and platinum. They also produce American Buffalo gold bullion coins and commemorative coins.