You cannot deny reality. The 30-06 is a bigger, more powerful round than the 6.5x55. It makes bigger holes and produces more damage in game animals, therefore, it kills animals more quickly than the 6.5x55. Both can be loaded to give deep penetration, so both will kill animals large and small. The 30-06 is just bigger and does more damage. It also produces about twice the recoil of the smaller 6.5x55. Both work. Pick your poison.
