It's interesting to revisit as there are better bullets and powders for both these days.
It's also a matter of what the rifle package looks like. For example, if the 270 win has a 24" barrel and weighs 8.5 pounds and the 6.5x55 has a 22" barrel and weighs 7 pounds; the 6.5 might be handier and lighter and make for a better carry rifle in certain situations and for certain animals; same can be said the other way around too depending what game and how it's hunted.
