Okay let's see.
A Comparison between Classic EQ (EQ and the first few expansions) and WoW.
EverQuest is First Person View
WoW is 3rd Person View(just like every other MMO)
EverQuest dungeons are not instanced
WoW Dungeons are instanced(just like every other MMO)
EverQuest had no maps
WoW had a GPS map(just like every other MMO)
EverQuest world is compromised of several zones
WoW is seamless (generally)(just like every other MMO)
EverQuest combat is about resource management
WoW's combat is faster paced and reactive (whak-a-mole)(just like every other MMO)
EverQuest itemization is interesting
WoW's itemization is boring and predictable (suffice/prefix... green, blue, purple..etc)(just like every other MMO)
EverQuest encourages grouping
WoW encouraged soloing and questing(just like every other MMO)
EverQuest death penalty is harsh
WoW death penalty is not really a penalty(just like every other MMO)
EverQuest night is dark
WoW's night is just a different shade of colors(just like every other MMO)
EverQuest limits your spell selection to 8
WoW doesn't, you have plenty of space to add all your spells(just like every other MMO)
EverQuest Dungeons are complex and huge. Not designed to be consumed in one night especially not with a pick-up-group
WoW's dungeons are linear and can be finished in a few hours/minutes(just like every other MMO)
EverQuest you're allowed to kill any NPC, including your trainer
WoW is strictly restricting you on who's you should and shouldn't attack.(just like every other MMO)
EverQuest have plenty of factions which you can adjust based on your actions
In WoW you have to choose one of two opposite sides (you cannot make the Horde like you if you're Alliance, for instance)(most other MMOs have that)
EverQuest trading was based on player-to-player interaction
WoW had the Auction House(just like every other MMO)
EverQuest NPC don't stop chasing you after you aggro them
WoW's NPC stop chasing you after a short while(just like every other MMO)
EverQuest had downtime
WoW eliminated downtime(just like every other MMO)
In EverQuest you could fizzle your spells if your skill is low
In WoW you cannot fizzle your spells(just like every other MMO)
In EverQuest low level characters can use high level items (there was no level restriction)
In WoW every item has its own level requirement(just like every other MMO)
In EverQuest you had a weight limit which you can carry based on your strength
In WoW you can carry as much as you want(just like every other MMO)
In EverQuest you raid with 200 other players
In WoW you're limited to 40(just like every other MMO?)
EverQuest monsters are unpredictable, they might be nasty underconned (Dvinn) you had no idea what you're going to face
In WoW you can see their levels, Elite or Not, and every encounter that's not a boss is painfully predictable(just like every other MMO)
In EverQuest you get hungry and thirsty
In WoW you use drink and food to regenerate mana/hp(just like every other MMO)
The list goes on, I'll stop here.
The differences aren't just minor/feature differences... they are huge fundamental game mechanics which results in completely different game experience. Totally different game concept. I'd say they are even different game genres.
If you think WoW is equal to EQ then you're the same person who thinks Diablo is equal to Baldur's Gate. Just because they both are isometric with "leveling" up going on, doesn't make them identical game experiences.