I will continue to add more infos as I learn and discover more about their differences.
Mesos paper
http://www.cs.berkeley.edu/~matei/papers/2011/nsdi_mesos.pdf
YARN intro article
http://developer.yahoo.com/blogs/hadoop/next-generation-apache-hadoop-mapreduce-scheduler-4141.html
YARN design doc
https://issues.apache.org/jira/secure/attachment/12486023/MapReduce_NextGen_Architecture.pdf
YARN Jira ticket