The Monkees' pilot is also different from the series proper.
Kind of a long story, but the initial pilot to get NBC to greenlight the show received very low scores with test audiences, so the creators went back to the drawing board and made a few edits. The show finally got greenlit, but rather than air as the first episode, it aired as the tenth episode of Season 1. A different episode was filmed and used as the first episode ("The Royal Flush").
In this original pilot, the guys' pad is very different than the set they'd use for the rest of the series. In fact, it was shot at an actual beach house in Malibu (back when Malibu wasn't quite as exclusive). They also were supposed to have a manager named Rudy, who also owned a record store. At the time, teen characters on TV were supposed to have at least one responsible adult around; Rudy (played by Kurt Russell's dad, Bing Russell) vanished (along with his daughter Jill who was friends with Vanessa, who was Davy's love interest) once the show went to series. From some scenes used during the audition phase of the show/band, the guys were supposed to have worked at the record store as well in between gigs. That concept also vanished.
It's also interesting to note that according to DVD commentary, the guys said the pilot was shot on a shoestring and the guys wore their own clothes and bathing suits rather than from wardrobe. The exception being their initial performance clothing, which was later replaced with the familiar red (or blue) button shirts. Even their guitar logo hadn't been developed yet and you'll notice it doesn't appear on the drum kit yet either.
The Monkeemobile hadn't been designed yet, so in some early episodes, the guys drove either a Woody, or a jeep.