Comparisons
These compare approaches, not named products. We have no verified data on how another extension behaves, and a table of guesses about a competitor would be worth nothing to you.
Built-in browser capture versus an extension
Chrome's DevTools "Capture full size screenshot" is free, built in, and enough for a simple page. It has no handling for sticky headers, lazy images or nested scrolling panels, no PDF export and no editor. On a static article it matches an extension; on an application-style page it usually does not.
Desktop screenshot tools versus browser capture
A desktop screenshot tool captures pixels on your screen, so it can photograph anything but can never reach below the fold of a webpage. A browser capture works inside the document, so it can scroll and join the whole page but only works on web pages. They solve different problems and most people need both.
Capture your first full page screenshot
Free, no account, and nothing leaves your computer.