Candid vs Posed, which one is better?

We've all tried to look good in a photo, whether it's finding your good side or your best smile, does posing always look better? Here is an example of both a posed shot and a candid one:

Here is my posed shot. The expressions shown in this photo are simply two smiling subjects, nothing is really interesting. All it is is a simplistic self portrait, there is no relationship shown between the subjects - these could be two perfect strangers simply smiling for a photo.

Now here is my candid shot. I feel this photo is a lot more interesting to look at as the two subjects are so busy laughing they are completely unaware of the camera taking a picture. This shot raises the questions, "what are they laughing at?", "why are they on the floor?" etc.
These two people are obviously friends, you can tell by the fact they're laughing together. This makes the shot a lot better than the posed one, in my opinion.