Working directory
working tree cleannothing differs from the last commit
Unchanged2
a.js
x.js
A addedM modifiedU untrackedD deleted
{ }select a file to edit
commit graph
A level is you typing real Git commands and editing files while the commit graph moves under you, all on one screen. That needs a keyboard and room for three columns.
Open it on a laptop and you will be rebasing within the hour.
Same starting point, same work, two different histories. Merge kept a truthful record of the fork; rebase produced a straight line by rewriting your commit. Neither is correct in general. The choice is about what you want the log to say.
Three panels, one loop. Nothing here can touch a real repository.