I'm not sure what you mean by a "Standard King," unless they list things differently on your side of the Atlantic. In normal Disneyspeak, a Standard room will have the least desirable locations/views (according to most folks, but not all) and will only have two queen beds. (There are no rooms with only one queen bed.) In Alligator Bayou the rooms will also have the fold down mini-bed. Standard, in this case, refers to the location rather than room "quality/decor." The interior space in all rooms is the same, so if you have two queen beds there is a bit less clear floor space than with just one king bed. This can be a consideration if you have need of floor area for an ECV, wheelchair, large luggage, etc. But, as I noted earlier, a king bed room is considered an upgrade in price, but not necessarily an upgrade in location/view, although a fairly high percentage of the king rooms are in the more desirable locations. The Preferred rooms are the ones that are based solely on their proximity to the main building, and they all tend to be better than standard rooms, at least in terms of the views. There are some king rooms in the preferred buildings, but if you want to be guaranteed that close proximity, you have to book it as a preferred room and not a king. If you book a king room you can always request that room in a preferred building, but, as stated earlier, requests are not the same as guarantees. I realize that this may seem a bit convoluted, but there is actually a system to it, and knowing how to match paying for certain room types and then enhancing that with the appropriate requests is all part of the fun for some of us regulars who know the layouts fairly well. To a newcomer, I'm sure it seems like talking in circles, but we're here to help...supposedly.
The rates you show make sense if you remember that standard is the lowest price room rate and king is usually one of the highest. A garden view is a slight upgrade from the standard rooms, but pretty much guarantees you won't be over looking the parking lot/carpark. All of the garden view rooms I have stayed in have been very nice, but my personal preference these days is for a river view room at the French Quarter. Just consider that the AB buildings at Riverside are basically rustic in their theme, both inside and out, and the Mansions are more stately and manicured in appearance. There are plenty of photos here that show you the difference between the areas, so browse around and see what strikes you. Again, as far as I'm concerned, there are no bad rooms. They all have their own charm. We are always happy to be at Port Orleans, wherever we decide to settle in.
The best I can come up with to summarize this whole business is this:
If you book a Preferred room, you are saying that your priority is proximity to the main building.
If you book a King room you are saying that the most important thing to you is a big bed.
Everything else is about whatever view you want outside your room.
Beyond that, you make your requests and take your chances.
Hope this helps.
