The Ultimate Edition is included in the 1-Click ! The Only difference is that it contains only the 4K UHD Disk, the other Disks 2D + 3D are part of the other 2 editions that comes with the Boxset. Bonus Items are separated between all 3 Editions(new strategy that Premium Retailers have started doing to avoid us from having 3 times the same bonus items when going for the 1-Click).
So The 1-Click is the Perfect Package, it contains everything. Only difference is the 2D+3D Disk is not part of the UE that comes with the Boxset(but why would you want another set of 2D+3D Disk when both Disks comes with the single lenti already ?! )
FAC have done this for a long while now, when they do more than 1 Edition each Editions will contain different Bonus Items.
HDzeta have done so for Mad Max: Fury Road(Golden Label) the Boxset had the Bonus Items separated between all the 3 edition included in the Boxset.
HDzeta Argo(Golden Label) The 4K UHD Disk only available in the 1 edition included in the Boxset, it can not be purchased separately. To have the complete Bonus Items one must Purchase the Boxset.
HDzeta Wonder Woman(Golden Label) will also have the same trend, 4K UHD only available when purchasing the Boxset. It is to be expected that the Bonus Items will follow this new trend.
New Boxset Trend: Multiple Editions ''that complement each others'' as Opposed to have the same disks and same Bonus Items 3 times
Other Premium Retailers will surely follow this trend that has been gaining momentum.