Wikis:Easy Colaboration For All

If blogs are about conversation and wikis are about collaboration/content, which of the following student projects would you use each for? Why?

First I would like to start by saying any of the following could be incorporated into a blog or a wikispace. Since you asked I will try to validate my reasoning on the genera I chose.

Novel study with author participation
Blog, The author can read what the students write and comment a blog is a "collaborative space" in using "connective writing." You do not need to change or add to what the student or author are writing. It would be a wikispace if they were writing a story together.

Students at two First Nation schools on New Brunswick and British Columbia recording and sharing Native stories and music
Wikispace, the project sounds more collaborative both schools can add to or change, with history can view any acts of vandalism.

a daily science journal
Wikispace, start from wikipedia and edit add to content that may not be there and it then be used as a resource. Inspire accuracy.

student creative writing with peer review
Blog, can use word and html it to blog. "Powerful Motivator" knowing what they write will be posted for the world to see. Since it is creative writing for peer review they can comment but they can not change it, otherwise it would be wikispace.