It's interesting, I wouldn't have guessed the SQL dialect differences to be the main reason to pick one database over another.

Other comments on this suggest it's very important to them, which is a surprise to me.

Rather, I would have bet on either the performance characteristics for your particular situation, the knowledge of your programmers (or db admins) / recruitment pool, or perhaps integrations with other software.

Still, a very useful looking tool, don't want to knock it.