The presentation in the article you link to is highly biased in favor for SQL Server. it tells us that "From a cost perspective, SQL Server is the clear winner." which is untrue since PostgreSQL supported by EnterpriseDB, SQL Server and Sybase all have so close TCOs that any minor tweaking of the assumptions could make any of them the winner.

For costs the article really only shows one thing: Oracle is way more expensive than the rest.

For the scoring model the article just asks us to trust in them since they do not provide the results of the feature scoring method.