Asking which is the coolest DB is bit like asking which is the coolest car. Debating whether a Porsche 911 is better than a Honda Civic is meaningless unless you define the comparison criteria (eg top speed & cornering vs price and MPG).
I am defining some criteria for DB comparison. Given these criteria, how awesome is your DB?
Some of these critiera are easy, having all of these critera is hard. Doing > 1 million update transactions per second with synchronous replication is really hard.
Disclaimer: these are my personal thoughts and do not represent Oracle's official viewpoint in any way, shape, or form.