These sorts of tests are utterly pointless. If you were to compare all cars currently available, the ones coming out top will probably all be sports cars. All useless if you have three kids.
Even the title gives this away. "General Purpose, High-End Storage Array". If you're using a high end array for general purpose storage in this day and age then you clearly have money to burn.
Seems to me like Gartner trying to be relevant. All their reports only ever get used by vendors who select the ones which favour them to use as a marketing tool. Like this article.
Anyone with any sense whatsoever who has this sort of money to spend will select a shortlist based on merit and cost, and run a proof of concept.