Looks like you've got full sets, @SAA44-40 ! Nice!
Here's a side-by-side look at a PB Swiss PH2 and a Wiha Softfinish as well as some others.
Here are a couple of the bit driver. I think the blade on the 100 mm driver might be machined from one piece of metal. In contrast the ones from Wera, Wiha, and Felo have multiple parts.
Here is a PB Swiss precision driver next to some drivers from Wera and Wiha. The handle on the PB Swiss is made of santoprene material and has a nice feel to it.
The PB Swiss and Wera drivers are designed to minimize rolling. The Wiha loves to roll off a surface.
The cap on the PB Swiss rotates smoother than the others. Wera is pretty good --no complaint. Sometimes the caps on the Wiha drivers don't move freely but they usually break in eventually.
The cap on the Wera drivers often have some flash left over from the molding process. That's right where you put your finger so I usually cut away the excess plastic.
The new line of PB Swiss precision drivers have slotted tips that are hollow ground. I wasn't aware of this change and I was surprised when I got it. I might pick up some of the older PB Swiss drivers for comparison. I think the old precision drivers had parallel tips like the full size drivers.
The driver on the left is a FULL SIZE (not precision size) PB Swiss (w/ parallel tip). The rest are precision drivers from PB Swiss (hollow ground), Wera, and Wiha.
I do think that the hollow ground PB Swiss fits better than the flat ground Wera and Wiha. But I'd like to compare the old (parallel tip) and new (hollow ground).