Also, you obviously did not search the site because many have asked the same question before! I take it you're interviewing and need this information to pass the interview even though you know NOTHING about the tools!
If that is correct (and to give you the benefit of the doubt I do say "if") That would make you a cheat! and cheating and interview questions are NOT allowed here on this site! And that alone is a reason to get you a permanent ban!
Talk about a misguided interview. I don't see that the versions make one an automation engineer. Perhaps I'm missing an all important history course on Mercury. Maybe it is a course required for a degree...
If you look for vendor specific information, log on to the vendor web site and look for different versions and feature lists. It is all there for you to browse. By the way, did you really read Shakespeare before deciding on the HamletPoison nickname or was it just a fortunate Freudian slip?