The wear is not just a function of unit pressure, but also a function of how worn (or stretched) your chain is, a chain that ha suffered more stretch will load the sprocket teeth more unevenly and cause more wear.
If you change your chain before 0.75% wear, or eralier, you may expect manu years of life from a single sprocket, if you buy a cheap chain and run it for 20months without changing it, no sprocket will survive.
I would say chain quality and chain stretch (and lubrication of sprocket and chain) are more important considerations.
But, to answer your question, for the same chain, a wider sprocket should be expected to last a little longer.