I have the 6.5x55 and the 7x57. At their velocities I cannot tell the difference in the results on deer and hogs with bullets 140 grains or less at the ranges you specify. 6.5 x 55 does shoot the longer bullets better, but the 7.08 comes in short action....
Hey, wait a minute, have we had this argument already ???
Either one will work very well for you. If you do not reload 7.08's are easier to find at standard/higher pressures, and in most places. If you do reload the 6.5 is an under appreciated gem.