Holdem Hi: 1712304 enumerated boards
cards win %win lose %lose tie %tie EV
Ac Ad 1315168 76.81 391637 22.87 5499 0.32 0.770
7s 6s 391637 22.87 1315168 76.81 5499 0.32 0.230

 Holdem Hi: 1712304 enumerated boards
cards win %win lose %lose tie %tie EV
Ac Ad 1314307 76.76 391582 22.87 6415 0.37 0.769
6s 5s 391582 22.87 1314307 76.76 6415 0.37 0.231

so, 76s actually flat out wins 55 more times, but 56s ties 916 more times.