Thank you, Darius: very interesting... Image may be NSFW.
Clik here to view.
Personally, I have tried creating new Windows 7, Windows 8, Ubuntu and OS X VMs, just to see how they defaulted for the virtual HDs: well, Windows 7 and 8 defaulted to SCSI for the HD and SATA for the CD/DVD, the same for Ubuntu, while OS X 10.7/10.8/10.9 had SATA for both.
BTW, previously, I had converted two existing OS X (10.7 and 10.8) VMs to SATA, and, IIRC (at least in the 10.8 one), the converted SATA HD appeared as an external one (in orange): maybe that - well, rather more cosmetic than substantial - issue should be addressed, in a future update...
But the most important question probably is: is a SATA virtual HD recommended for Windows 7/8/8.1 and Ubuntu - or is it better to remain with SCSI...?
Well, let's try and see (SATA, anyway, looks more "(post)modern", so to speak)...
