I am running Windows 8 Pro.
Defraggler correctly labels both drives as SSD in the main list (in the "Media Type" column).
The first one (C:\), which is removed when I un-check the "Show SSD drives", is a SanDisk SDSSDX240GG25 (SanDisk Extreme 250GB).
The second one (D:\), which is NOT removed when I un-check the checkbox, is a Kingston SV100S2128G (Kingston SSDNow 128 GB).