It's worth noting that SSD based VPS hosting isn't always faster. For example, the host/physical server could have RAID 10 Disk Arrays with 4 * SSD drives and, if someone is using huge amounts of CPU, the host node performance will drop (in some cases, quite significantly). It just comes down to how the host manage the server, how many virtual instances they place on it and also the quality of the hardware, processor and so on.