Is this the same as a "HG" splined cassette hub? Because that's what the "Gusset 1'er steel cog" says it is on the Cambria site.

Or is this the same as a "Shimano MX66 cog?" Because that's what the Shimano cog says it is on the Cambria site.

Or is this the same as the "Shimano BMX cog?" Because that's what the Dimension cog says it is on the Cambria site.

Or is this the same as the "Shimano Dura Ace 7600" threaded cog? Because that's what the Dura Ace cog says it is on the Cambria site.

Or is this the same as the "Shimano 1 type cog?" Because that's what the Crupi cog says it is on the Cambria site.

And these are just from the first page of MULTIPLE pages of cogs. There is NO compatibility chart given, and only some of the cogs have sufficient info to determine their dimensions. So what, exactly, is a "standard Shimano/Sram spline pattern?" And how, exactly, does it match with the other definitions given in the product descriptions?