OrCad X standard vs OrCad X Professional

Please see this matrix from Parallel systems in the UK which lists the differences between orcad standard orcad professional and allegro 

The differences will be found at the bottom of the matrix

The matrix has been updated with Orcad X name on it but it is partly wrong. The licence "Orcad X Pro" has more features taken from Allegro than "Orcad Pro"  For instance, with Orcad X pro the constraint manager now includes electrical rules for "VIA" and "return path". These were exclusive features to Allegro high speed package, now ordinary people (like us) can avail to it. 

But my feeling is that Cadence is still in progress of documenting properly all the changes in Orcad X pro versus Orcad pro. There is also a discrepency of features enabled between Orcad PCB editor and Orcad Presto. Presently if you want to use the new high speed feature of constraint manager, they are only reachable thru Orcad Presto. Even with an Orcad X pro license, Orcad PCB editor behave like with an Orcad pro license. It is a bit weird. I dont know if Cadence plan is to keep both PCB editor, or to gradually discontinue Orcad PCB Editor. Many questions are left to be answered...

I found a comparison on the website of the Danish distributor, but it doesn't seem to me that there is a rule available for dynamic phase control in OrCad X Standard.

https://www.nordcad.eu/products-services/ecad/pcb-design/orcad-features/

Why is the licensing so convoluted, and the Cadence doesn't officially provide exact differences?"

So OrCAD X Std doesn't have dynamic phase in PCB Editor - only static phase unless you use OrCAD X Presto Std. Keep an eye on the Parallel Systems Matrix - we are in the process of trying to add a Presto version. It is currently valid for PCB Editor. 

Edit - try this: OrCADX - Parallel Systems (parallel-systems.co.uk) at the bottom is a comparison list that should help.