Maybe god be with you, cause these types of questions aren't going to go well with most people here. I'll answer some of your questions in short. The AK-47 and AK-74/101/102etc have lots of little differences in the receiver, pistol grip, front grip and front assembly. Will... basically they're quite different and alike in design. If we're talking about cosmetic differences then google is your friend, cause you can easily distinguish the differences through images of the rifles.
By-the-way if you want quality AK then you might want to get age verified and look into a Real Sword TYPE 56, similar to the last image you provided which is not an AK-74.
Last edited by Cheeseman; February 17th, 2009 at 22:08..