The differences you mentioned are not substantative for a few reasons, but let's go through them. 3, 4, 5, and 7 were all based off the game's popularity, something that is based on how well the public receives it (unless you're saying that they're both high-quality games, which is true, but by that standard, all high-quality games are inherently extremely similar, and how similar are Halo 2 and World of Warcraft? If you juxtaposition the era, then they share every one of those similarities). 6 is part and parcel of what we are arguing about.
The reason why those similarities are important is because they are the reasons that Fire Emblem got into Super Smash Bros. So, they should also be the reasons that Advance Wars get into Brawl.
As, I have said earlier, there are 3 criteria towards whether a character/franchise deserves to be in Brawl: popularity, uniqueness, and importance. The similarities that I pointed out show that Advance Wars has similar popularity, uniqueness and importance. to Fire Emblem. So, it should be included in Brawl. So, you see, if it was just an argument about gameplay, it would be a silly argument.
Reasons why Fire Emblem was in Melee:
1. It represented Intelligent systems.
2. It was a fairly popular in Japan.
3. It was a unique game.
4. It was an important part of the NES era in Japan.
5. It wass a long running series, which additionally shows it's importance to Nintendo.
And a reason why Fire Emblem is in Brawl:
1. It was recently introduced to America were it become moderately popular.
Reasons why Advance Wars should be in Melee:
1. It represents Intelligent systems.
2. It is a fairly popular in Japan.
3. It is a unique game.
4. It was an important part of the NES era in Japan.
5. It is a long running series, which additionally shows it's importance to Nintendo.
7. It was recently introduced to America were it become moderately popular.
I think you should probably get my point by now. So, as the title of the thread suggests, if Fire Emblem got in, couldn't Advance Wars get in?