https://wccftech.com/wow-classic-demo-max-graphics-classic/

A new video has surfaced online which compares the original vanilla World of Warcraft visuals to the new WoW Classic Demo graphics on ultra-high settings.

The preload for the upcoming WoW Classic demo went up last week and datamining revealed a ‘Classic’ button in the system pane. Reportedly, the WoW Classic demo used the modern Legion/Battle for Azeroth client with its more advanced graphical options, and the ‘Classic’ button allows players to switch back to the original Vanilla graphics from 2004.