One thing people pro "wave piercing" bows claims is that the wind drag is lower.
The relative wind angle close to the water is very small so the so the difference in wind drag between a normal and "wave piercing" bow is extremely small and should not affect the performance.
We have notice that several of our competitors new designs are not really "wave piercing" but in essentially normal bows that has been reshaped close to the deck to look like a "wave piercing" bow.
We at Marstrom think "wave piercing" bows are just a fashion and we can already see tendencies that is on its way out.