Alonso/Tello have the higher first-strike ceiling (Tello’s power + Alonso’s speed) but can leak control if rallies extend and their bandeja/víboras don’t pin the right side. Yanguas/Stupaczuk are the more structured pair: heavy volume, superior transition defense, and better rally management in humid Cancún conditions that often reward patience. Slight edge to Yanguas/Stupa in three sets if they neutralize Tello’s overheads and target Alonso under pressure.