Don't be confused, just get it before they're all gone. Others have made that same mistake. It's just the spur. They redesigned the tabs on the BRCC & Typhon spur to hold the plates better, or so it seems. I have both spurs between my Granite, Senton, & Typhon. Neither have had any problems so far.
Aaaaaaand they're all gone... There must be a scavenger on this thread haha... Ill keep looking.... It's good to know that Typhon / BRCC and Granite/Senton assemblies are interchangable despite different part numbers.... Thanks for your help.