The Spider-Man animated series of the 1960s featured superior artwork, animation, music, voice talents and storlines that generally followed the original source material.
These two episodes probably illistrate what was a common trend in the series; super villians that were both generic villians (thieves, monsters and robots) mixed in with more well-known comic book villians (who were sometimes changed).
For one reason or another, the Green Goblin was depicted as an actual goblin as opposed to a wealthy mad scientest wearing a costume. Granted, the secret identity of the Green Goblin had not, yet, been revealed in the comics, but this was a odd trend that continued with two Spider-Man shows that aired during the 1980s. In many regards, this Spider-Man animated series was better then the two subsequent efforts made in the 1980s.