I've been shooting for 50 years and the 90mm Apo Symmar noticeably sharper than anything I've come across. When I had Blads I didn't have the 100 but had the 180 which was superb. Still the 90 is the highest resolving lens I've owned.
All the Rollei lenses are outstanding. I've used both and the Rollei lenses are generally sharper than the Blad equivalent but the images from the Blad "look" nicer.