If you care about longevity and durability of your shoes... full-grain is your only option.
If you would like your shoes to last you a long time, and grow more comfortable over the years while looking better and better, anything other than full-grain leathers is sub-optimal.
Your Cobblestones are made from the highest quality full-grain leathers.
Walk a mile in your Cobblestones. Then walk a hundred miles. Then a thousand.
With each step you take, the leather moulds itself to your feet. Over time, your Cobblestones become a part of you. Assume formlessness. Comfort like no other.
Sure, you may need to resole them from time to time. But the shoes themselves get better as they age.
Try free for first 60 days. Either Cobblestones are the most comfortable shoes you have ever enconsed your feet in, or return them for a full refund. Used.