So, the 3ds Youtube App came out, and we have found a way to use it as a web browser (thanks, jsa005).

So, I decided to do a few tests on it. Here are the results:

1- On HTML5Test, the Yotube app scored 176 points, while the 'normal' web browser scores 97 points.

2- The agent of the Yotube app is "Mozilla/5.0 (Nintendo 3DS; U; Factory Media Production; en) Version/1.7498.US"

The agent of the 'normal' web browser is "Mozilla/5.0 (Nintendo 3DS; U;; en) Version/1.7552.US"

Both versions are not the same. Also, some guys over 3dsHomebrew got "Mozilla/5.0 ( en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0.#" out of the ram, but he is not sure if it is relevant.

3- When attempting to download a file, the 'normal' web browser will say "The file cannot be loaded." while the Youtube web browser will attempt to open the file as a text file.

4- The Yotube web browser will play HTML5 videos (MPEG-4 and H.264)

Post new discoveries in comments!