For the varmint cartridges, the Hornady Z-max is the same as the V-max, the larger calibers are A-max's or SST's, with a few exceptions (as noted above for the 300 blackout).
The good news - if you call Hornady, they'll tell you exactly what is what, in less time it takes to write a thread and wait for a response from those of us who've called before.
Interestingly, the Remington Accu-tips are also Hornady V-max's, as are the Federal American Eagle Tipped Varmint (some with cannelures).
Hornady is getting lots of market usage out of the same product.