Choosing a data store based upon syntax and slightly limited ORM support isn't exactly a great idea. Both of these things can be improved rapidly with a little code.
More important questions are how is the data stored, how is it accessible, how can you scale the system, what operational constraints are there, how fast is it, what types of data modeling can be done, what consistency/transaction guarantees does it provide, etc. These are the things that will make developers productive because they will not be putting out fires all the time.
