Woooo, so much going on here. In the world of AK variations there are many. You usually want to talk in terms of preban, transitional, post ban and kit built.
Pre-ban - Factory armory built with evil features, e.g. night sights, bayonet lug, pistol grip
Transitional - Factory armory built, evil features neutered stateside. Most were stuck in customs when the 1989 AWB went into effect. They were modified to be compliant with the new law and subsequently released for sale. There was nothing restricting owners from returning to original configuration. Most rifles were sold with said removed parts.
Post-ban - Factory armory built, manufactured without evil features. These are what you see on the shelves today
Kit Built - Built from a pile of parts. Older kits were imported sans the receiver. Newer kits sans the receiver and barrel. Best examples are demilled from armory storage, typically in unissued condition, with original barrel, all serial numbers match. Prices vary wildly based on condition and rarity.
Pre-bans are considered the most desirable and well built AK's on the market.
Options were:
Chinese - Shit ton, lots of importers
Hungarian - Not many, one importer
Yugoslavian - Not many, two importers
Egyptian - Not many, one importer
The post-ban options are diverse and many. I won't even take a stab at summarizing them here. Some are really nice and some are crap.
The above Yugo beauty is a Mitchell Arms (second importer) transitional model. 800 transitional model standard barrel .308's were imported. Mine was put back to original preban configuration with the exception of the bayonet lug, which they ground off. Has an exceedingly rare Italian Import optics mount. Lowers the optic about an inch vs. the standard Mitchell mount. Possibly the only one in the country.
Below are a few I sold to pay for college (being an adult sucks most of the time)
Mitchell Arms transitional RPK heavy barrel in .308, 100 imported. Correct Mitchell optics mount and ZRAK .308 cammed 6x32 scope
Mitchell Arms preban standard barrel in x39, 1000 imported. Correct Mitchell optics mount and ZRAK .x39 cammed 4x32 scope (1 of 6 documented x39 scopes in country)