A SO question about comparing Snap and Yesod where both maintainers chime in. The major point of talking here is the Yesod style "Template Haskell" configuration.
And finally my favorite summary of the whole thing: the Web Framework matrix which considers each as a web programming embedded DSL and talks about their relative merits in a 2x2 table.
1. http://www.haskell.org/haskellwiki/Web/Comparison_of_Happsta...
A relatively complete listing of resources comparing the three major framework/libraries. A lot of this information is outdated, sadly.
2. http://stackoverflow.com/questions/5645168/comparing-haskell...
A SO question about comparing Snap and Yesod where both maintainers chime in. The major point of talking here is the Yesod style "Template Haskell" configuration.
3. http://www.reddit.com/r/haskell/comments/l0fne/what_should_i...
A similar question posed to /r/haskell with a great comment by yogostoth demonstrating Yesod.
4. http://softwaresimply.blogspot.com/2012/04/hopefully-fair-an...
A relatively balanced view comparing the three feature by feature. Again a bit outdated, but well-informed.
5. http://softwaresimply.blogspot.com/2012/12/haskell-web-frame...
And finally my favorite summary of the whole thing: the Web Framework matrix which considers each as a web programming embedded DSL and talks about their relative merits in a 2x2 table.