To be fair, it would be difficult to search on this topic. That said, I'm tired of explaining it.
Search tip: check the dates you are searching on. The default is to only search in the previous week.
In a nutshell: There's been a series of changes made over the years. Enough were made that Axiom decided to change the moniker. There are changes to crossover, binding posts, and cabinet shape, which were all made at different times. There's not enough of a difference to warrant upgrading, in my opinion.
