The assault weapon ban expired in 2004.
It banned the following things:
- Assault style rifles. (a rifle having at least 2 of: folding or telescoping stocks, pistol grip, bayonet mount, flash suppressor or threaded barrel for one, barrel attached grenade launcher.
- Certain modifications to semi-automatic pistols and semiautomatic shotguns. (these are pretty similar to the rifle ban and can be found on wikipedia, I won't list them here).
As you can see, most of the things included in the ban were cosmetic enhancements to a gun. It would be impossible to list specific models as many guns are customizable with any and all of the enhancements that are listed here. So a few specific guns (those listed in the question) were banned, but mostly the ban was governing the style of rifles that could be sold, not the models.
This graphic from the Violence Policy Center shows the modifications made to popular guns to make them compliant with the assault weapons ban. Model numbers we changed, and features were modified (note the lack of a flash supressor on the TEC AB-10, the shorter clip on the Match Target etc), the SSR-74-2 is based on the AK-74 (same family as the AK-47), but uses a different caliber bullet. (It should be noted that as with the SSR-74, some of these are more than cosmetic changes, this is due to the entire model being banned, not the cosmetic bans)
As far as how the banned models differed. You'd see a shotgun with either a folding stock or a pistol grip, not both. Or a rifle with just a pistol grip, but not a folding stock. Or just a bayonet mount, but not a pistol grip, or folding stock.
There was one provision that did have to do with ammunition capacity. High capacity magazines were banned under the law. The law set the maximum capacity for a magazine at 10.