I have created a comparison between different material providers about what they are offering for different Levels. I have made this based upon my knowledge. If you think there is any thing missing or other important aspects which must be a part of this comparison please paste it either as a comment or email me firstname.lastname@example.org. This comparison can be used by prospective students to reach to their desired material provider without wasting any time on figuring out what is provided by whom!
Comparison can be accessed through the following link.
PS: Please not that the purpose is not to identify which material provider is better than the other. The sole reason is to highlight the services offered by different material providers in order to create ease for candidates to identy. This is also posted in Level II forum.