i'm confused, sorry.
But on this review they clearly state the disk is 7200 ???
http://www.expertreviews.co.uk/external-hard-drives/278275/lacie-rugged-usb-3-0
Different drive, and different dimensions. The one you refer to is the Rugged.
The Thunderbolt/USB version is the thinner Rugged mini.
Refer to website for details.