In my opinion PB Swiss are way ahead!
I bought a set of PB ball hex drivers about 20 years ago (first ever PB), I've used them most weeks since (sometimes all week), they still show no wear and they were secondhand when I got them! Wiha are fine, but I don't believe there is anything in their line as durable or as well made as the PB with te classic handle!
If in doubt, handle a PB driver alongside a Wiha. Unless you really make an effort and order from Germany, most Wiha's come with soft finish handles, which they imply are some sort of advantage, but in reality are simply cheap to make. Yes the PB smell of vomit if you leave them sealed up, but I don't!
Next look at the blades, the PB are made to a far higher standard. Much more accurate, and hollow ground as well. The plating on the PB is in a different league to the Wiha, who mostly offer an o.k but not exceptional matt plate.
Finally, use 'em for a couple decades! As stated, my PB ball hex drivers are still in good shape after 20 years plus, whereas the smaller sizes of my oldest Wiha's have all broken!
If you're still in doubt, vist a show where PB are displaying and have chat to Max Baumann who runs PB. The guy is a complete enthusiast who seems to have dedicated his life to building a better allen key and screwdriver! I might not want him as an exciting dinner guest, but I don't believe anybody builds better tools!
Having said all that, if you are in the USA, and your choice is Snap On and suchlike, or Chinese ****, then Wiha is a great mid price alternative, but PB are a notch above! I Just wish they made Inch sizes!