Re: Slightly off-topic question
I suspect it is partly how much input the IT group had in some of the decisions and partly timing. As far as any system that fundamentally uses a relational dbms as its backend, it really does not matter which is used. All have their strengths and weaknesses. The stuff such as CRM is just a way to manage the information. Often these tools should be written in house rather than bought for a large company; the needs are too specialized to dumb source it in any way.