[marginalia_nu]

I'm not even entirely sure what such a comparison means for a DBMS to be faster than another.

In practice, claims boil down to this query is 182x faster than that query in MySQL.

Using the same type of comparison, you can come to the conclusion that MySQL is 10x faster than MySQL because one query was constructed one way and the other another. (Applying induction, we can thus prove that MySQL is infinitely fast ;-)