Drive for iMovie/FCPX Scratch Disk

I currently use a 2TB WD My Passport Studio drive as my editing scratch disk, connected via FireWire800.
I'm considering changing this to a USB3 drive, due to the obvious faster speeds.

However, is USB3 actually better then FireWire for video editing? I've heard that FireWire streams the data back and forth better then USB, which sends data in packets instead.

Is this correct, or should I switch to a USB3 drive? I will be selling my FireWire drive and the USB3 is cheaper anyway so it shouldn't cost me any extra anyways. Just wondering if I'm making the right move?

 

Ok, so from a little more research I'm reading both FireWire800 and Thunderbolt would be best because of their sustained throughput......?

 

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