1. Using the freeze bar in SOLIDWORKS is different than having a PDM vault and the file locked (checked in). Just because the part model is not checked out does not mean that SOLIDWORKS will not rebuild the model in SOLIDWORKS (especially if you select Ctrl-Q on the keyboard. From testing a few year...

Diaval, Thanks for the reminder of the added features, I've personally used all but the last one in your list "PDM Standard and Pro have administrator defined custom column sets added in 2021". Not too many customers have upgraded to 2021 yet, that's usually starting in about the July - Au...

Here is a comparison chart that I created when PDM Standard first came out. There might be a few things out of date but I think you'll find it t be pretty close.

Hopefully this helps, let me know if you've got any comments as I will update and repost.

Regards,

~Tom