The link doesn't work, but I assume you're referring to the slipperential (there's a threat about that on here somewhere).
This one does not look like it incorporates a diff, just slipper. But that might be enough for me since I may go 2WD: like the 'cheater' cars popular in 1/10.
The slipper function sounds good to me since it would protect my light moter?
edit: at a much lower cost than the slipperential
