I hardly consider interfaces the defining aspect of a game. Other than that you have Orcs and humans which Warhammer did before Warcraft. Warhammer came out in 1983 I believe.
And how could they be the same game when one revolves around PVE and the other PVP? And I could go on about other differences. But I see youre just doing your argue for sake of arguing thing.
And Im not sure what "wow killer" has to do with anything.
What gameplay? Attacking a target? And as far as lore theres nothing to argue about Warhammer came out 10 years before Warcraft.
That's because you are judging it based on the MMO environment today. The MMO climate was different back then and blizzard was setting all of the standards with the overall interface with stuff like how we interacted with NPCs, got quests, handled groups, chat, etc. Other similar games such as Everyquest 2 had interfaces that were very different. Today we don't give it much thought about games that play very similar to wow, but it was different then.
The whole PVE/PVP comparison is only a small part of it. It was the overall package. Also, when you actively market your game as the one that will topple the Blizzard empire then yes, the whole "wow killer" thing matters because it makes people twice as critical as they would have been. It sounds stupid I know but then again we are talking about wow players. They don't let anything pass. Even today, people who haven't played for years can still keep threads going for weeks arguing over the smallest details.
I get what you are getting at but this is one of those things were reality tends to contradict reason.