I played so I understand horse wow classic gold spawn type/level/name and all place vanilla beta rerolled on almost all fresh server. I know that servers are like vanilla. Virtually all mining and plant vein place aren’t where they were, many missing and many additional location (do not understand why they havent used gatherer databases for location and type), their kind also distinct and the »infrequent » vein spawn mechanism is non existent (mended gold or truesilver etc. place even tought in vanilla almost any mithril iron and these had a %chance to spawn their rare equivalent), pursuit item locations are different (for example tanaris Gahz’ridian decoration things near ogres have a different location on earth and lots of missing), about 80 percent of those mobs spawn at a different location, have distinct motion paths. In vanilla their level was random + / – 1 level, on personal servers they respawn as type and same lvl.
Also quest mechanics on quests are usually distinct, distinct behaviour and marginally different waypoints and paths, for example chicken escort quests have lil random ambush mobs and different waypoints spawn place and lvl or their number were different too. Mob flee mechanics are gold in wow classic distinct (direction and speed). Those notice these who quested/leveled in vanilla 20-30+ character.