Need help with Dock (port replicator) for HP ZBook 15 G4

[metropole]

Hi,

I just got a HP ZBook 15 G4. Realizing there are no more docking stations for this laptop I am looking at ta port replicator dock.
I believe this document describes the options:
http://www8.hp.com/h20195/v2/getpdf.aspx/c04834949.pdf

Am I concluding correctly that that I could use either
HP ZBook Thunderbolt 3 Dock
or
HP Thunderbolt™ Dock G2
?

If so, is there any relevant difference?