That could be interesting. I wonder if WinPE has USB 3.0 support? Restore from external should be a lot faster if you can run at USB 3.0 speed. I'm using Macrium and at the moment I have to boot from USB stick then load the USB 3.0 driver
manually if I want USB 3.0 speed. A bit of a kludge.
edit: looks like Macrium 5 now has USB 3.0 support in both the Linux and WinPE boot discs. At least according to the features page. But they want $22.50 to upgrade from 4.2 paid std version.
I got the Macrium 5 trial. The Linux boot should have USB 3.0 support. I'm not going to test it tonight though. The Macrium Free edition 5 should be out in awhile. I bet they use the same Linux boot CD for it or maybe one version behind, when that is released. But I expect it to have USB 3.0 support as there's been a lot of clamor for it on the Macrium forums.
edit2: the product you mention I looked at the instructions how to make the WinPE disc. It's version 3.0 not the latest 3.1. Also they make you download WAIK(which is a GB download) so it looks like you either don't get the full WinPE or they are somehow kludging it.