Hernandez/Martinez profile as the steadier, percentage-based pair, while Sanz/Nieto are likelier to win through pace, counterpunching and quick transitions—high-upside but slightly higher error risk under Major pressure. In Rome-style Major conditions (often medium-fast with lively bounce), the team that secures net first and protects the middle should control most rallies. Slight edge to Sanz/Nieto if they impose tempo early; otherwise Hernandez/Martinez can grind them down in extended exchanges.