MowTin, I think the first flaw in your argument is you seem confident that it's reasonable to compare two games that have almost no similarities in genre, style, gameplay, graphics, sounds, etc.
The second flaw in your argument is that you seem to suggest that critics and users have not given MGS4 perfect scores... or that they must be insane if they did.
GTA IV is rated higher by both some critics and some user reviews.
*fixed
Here are just some of the critics that gave MGS4 a perfect score:
- AceGamez
- Console Monster
- Digital Chumps
- G4 - X-Play
- Game Industry News
- Game Informer
- Game Revolution
- GamePro
- GamerNode
- GameShark
- GameSpot
- Gaming Age
- Giant Bomb
- Hardcore Gamer Magazine
- Hooked Gamers
- IGN
- Kombo
- Lawrence
- Official Playstation Magazine
- Playstation Official Magazine UK
- PSX Extreme
- Thunderbolt
- ZTGameDomain
A few gave MGS4 a higher score than GTAIV like:
- Game Chronicles
- Game Revolution
- GamerNode
- GameTap
- Gaming Age
As for users, perhaps you may not have checked GameRankings, but the current average user score for
GTAIV is 7.9 while the average user score for
MGS4 is 8.6 - both are lower than the average critics score.
The difference is even greater at MetaCritic, where the average user score for
GTAIV is also 7.9 while the average user score for
MGS4 is an impressive 9.1 - it's also worth pointing out that not only has MGS4 gotten higher average user scores than GTAIV, but MGS4 has also received the most user votes, by nearly a 3:1 ratio, despite not being out as long... which is an indicator on it's popularity as well.
Now just so you know, I am not a fan of MGS games, and so not only do I not own any of them, but I do own GTAIV and really enjoy it... even with all it's flaws, and good lord there are many of them.
As far as predicting which will win the most "Game of the Year" awards, I suspect it will be GTAIV, not because it's the best game, but it clearly has a broader range of appeal, especially being a multi-platform release. It also doesn't hurt that GTAIV is an open world game with excellent online gameplay modes.