Creo Packages

We are negotiating getting back on maintenance with our VAR.  We had intended to wait until the end of the year, but with the discontinuation of the Winback program, it looks like we need to move now.

Our VAR has presented moving to one of the "PTC Creo Essentials" packages, specifically Essentials Team.  These are configured differently from the old packages, in fact, many of the old extensions aren't mentioned but are implied.  Fore example, there is no "advanced assembly", but the "top Down Design Tools" in Essentials Team sounds like it might be the same.  There is no ISDX, but there is something in the base Essentials package called "Parametric & Freestyle surfacing".  It seems odd that they'd include ISDX in the base package, however. 

So I decided to dig around for more info on these and I can't find anything on them at PTC.com. A search for "Creo Essentials" turns up nothing. If you browse to the CAD Packages page, they are called Engineer I, Engineer II, etc. and are similar to the old packages from 5 or so years ago.  AAX is mentioned, ISDX is mentioned as are all the familiar old add ons.  There are no add ons mentioned in the Creo Essentials documentation, just 4 different packages.

Can anyone shed any light on these two package sets and how they relate?  Of course, I intend to ask my VAR, but if anyone here has some info I'd love to hear it.  I've attached the PDFs for each here.