I've been on calls w/ Moshe :D Infinidat is all about capacity, we tend to see them as B2D targets or for long term warm storage. Pure is more about performance. They have never shipped a device with spinning disks in them, so even their capacity series is all flash. The m series I'm using (now the X series) is designed for ultra low latency, even under heavy load I almost never see read or write times north of 1ms.