Originally Posted by Louis XIV
Shell is not of higher quality than calf, it's just a different leather.
In fairness, that depends on your definition of quality. A definition has to be presented before one can be picked.
If quality is equitable to durability and longevity, shell is much higher quality than calf.
If quality speaks towards presentation or appearance, they can just be called different leathers for different purposes.
If quality speaks towards rarity, shell wins again.
If quality speaks towards difficulty and level of hand-work in manufactering, I think shell wins again.
If quality is regarding the formality (higher quality?) of clothing that it can be worn with, it seems that calf wins.
Some consider ease of maintentance to be reflective of higher quality. Many say that they find shell to be higher maintenance that calf, but those who subscribe to the Mac Method probably say that it is much easier to maintain than calf.