Gentlemen-
I am asking from a position of extreme ignorance here, so please be kind

Are there any quick answers or easy references that state the differences between the popular models of Gillette DEs?

For example, is a Fat Boy just a beefy Slim or is there a difference in the mechanism?

Is the Aristocrat just a Super Speed (non adjustable) or Slim (adjustable) packaged in a fancy box, or is there something more?

Thanks in advance for any and all info - Gags