All SSD VPS plans are covered under the Fully Managed Support option, while the Classic VPS plans cover basic support only. SSD VPS come with SSD hardrives that provide higher sequential and random data read/write rates that enables the solid state drive to perform better than the traditional hard drives that come with Classic VPS.
An average bootup time of Classic Windows VPS is around 40 seconds, while the SSD Windows VPS takes around 20 seconds.
For the detailed comparison, you can refer to this article.
