Re: HCI - the great distraction of our time.
SolidFire guarantees 50K/100K IOPS per node (depends on exact model) and there is no matter what kind of data do you store. No matter can this data be compressed or deduplicated, use you snapshots, clones, replication or not. The same thing with QoS. Minimum performance is always guaranteed.
I think there is less performance per HCI node as it uses just 6 SSDs, but anyway it is guaranteed and independent from compute nodes that gives you really predictable performance for VMs.