what is the difference between this spur http://www.ebay.co.uk/itm/Slash-4x4-...#ht_1874wt_948
and this one http://www.ebay.co.uk/itm/TRAXXAS-SL...e#ht_500wt_967
thank you.. the first link says something about center diff.
but my question is.. the center diff is where the other spur (2nd link) goes.. is it right?
so where is the difference?