Sorry, no. I saw a demo of a Xerox workstation at PARC in 1982, probably not that different from the demo Steve Jobs got. It was a lot more advanced than suggested by this article, which seems to miss that office applications were written on top of the system the article describes and provided much of the needed functionality. As a programmer you had a much worse interface, but the programs that had been written did the work. The Lisa end user experience wasn't that different from the Xerox Alto. The Mac made a lot of simplifications to make things smoother.
The demo Jobs & Co were given did not involve Xerox Star. (It was still the experimental PARC software.) The Xerox Star interface and OS were developed by Xerox SDD.
(One in practice rather problematic side of the Star was the extensive licensing that came with it. You needed an extra license for about every feature. Italic text? Get a new license, ect. This probably hindered its success as much as its – by virtue of this licensing policy ever growing – price tag. Also, the Star's still discrete processor may have been somewhat challenged at times. On the other hand, other than the Lisa, it feature full network integration. Regarding the end user experience, it was probably noticeable different from the Lisa, as there was no drag&drop and direct manipulation on the OS side of things. Rather, it was: click to select, press keyboard key to select function, use mouse to execute. Technically, the Star relied on property sheets for objects, which could be either presented as menus, button arrays or dialogs. Notably, this did not involve hierarchical structures, so there were no hierarchical menus.)
Key to understanding is that GUI operations were two-handed, descending directly from NLS (people have all seen the ‘mother of all demos’², right?). Right hand on the mouse, left hand on the left function key cluster³ — one of the Star papers is explicit that the left cluster was a direct substitution for the NLS/Alto chord set.
A very noticeable difference from the familiar Lisa lineage is Move and Copy vs Cut and Paste — there was no clipboard. (Here I think Star got it right and Tesler got it wrong: the condition of the clipboard containing invisible fragile state is a mode, and a worse one than move-in-progress.)
¹ https://github.com/livingcomputermuseum/Darkstar