[quote="Simba_Lion"]
- there is no Lion Guard (just to make it clear, I don't hate TLG
)
[/quote]
Well, from what I've seen and read, in cases where there are multiple pride males (which is usually the case, actually), you typically see one of these males becoming the most dominant and having the most breeding rights, while the other members of his coalition play more of a role in defending the territory (though they do typically have their own smaller families, smaller here meaning they mate with fewer females and so sire fewer cubs). Not that the dominant male doesn't do his own fighting, but there is something of a 'guard' that forms within their hierarchy, especially when the coalition contains more than two individuals.
Another difference is that real lionesses usually separate themselves from their prides to give birth, and don't typically rejoin the group until the cubs are about six to eight weeks old. In the film it seems that birthing happens at Pride Rock itself, and based on the cubs' ages during their presentation ceremonies, they are younger than the six-week time frame.
One more difference: pretty much all real lions have vertical tear-shaped marks over their eyebrows and a dorsal stripe over their foreheads and necks (though the mane obscures the stripe in males). None of the film's lions have the former feature, and Zira is the only character who has a dorsal stripe.
A similarity I will contribute is that the pelt colors aren't actually impossible in real life lions. Sure, the bright red manes are out of the question, but there are various pigment-related mutations that can cause lions to have a wide range of hues, including Mufasa and his lineage's bright yellowish-golden look, Scar and Kovu's deeper brownish color, and even the grey seen in some of the Outsiders.