Thanks for the link, very useful.
I asked because the OE DID chain is listed in the workshop manual as a ZVM type, which is stronger than the VX. However, looking at DID's website now it appears that they now recommend the VX for the Gen 1 and the ZVM for the Gen 2. If I've read it right, they've upgunned both types so the VX is now very close to the tensile strength of the original ZVM.
Good news for you (and me, I need a new chain soon) because the VX is a good deal cheaper!