Comparisons between BigData Solutions.

I've been researching on BigData for the last couple of months and started doing my FYP which is to analyze BigData using MapReduce and HDInsight in Windows Azure.

I just came to this particular confusion where, which platform could be better to do BigData analytics in terms of cost, performance, stability etc. such as Amazon, Oracle, IBM etc. This question could be too broad but I just wanted to get a basic idea of how they can be differentiated when compared to Azure HDInsight.

To be short, HDInsight vs Other BigData Solutions for BigData analytics. Any help would be appreciated.