Basil Safwat with an excellently detailed analysis of why the UI for closing tabs is superior on Chrome:
What has happened here? Well, while Safari resizes the width of the remaining tabs to fill the newly available space each time a tab is closed – Chrome does not. So when a tab is closed from the left in Chrome, no resizing takes place, the rest of the tabs move along one, lining up the next close button directly under the mouse pointer, ready for the next click.
Now, Chrome will resize the tabs to fit the remaining space, but only after the mouse has left the functional area at the top of the browser; that is, after the user has finished interacting with the tabs and has moved their attention elsewhere.
When I switched to Chrome some time ago it was for several reasons, but the better tab management in it is a big one.