This kind of question and arguments is amusing but it mostly lght and heat with little difference in application. Fact is, there's a quantium difference in potential between the old .270 and "new" .260 but for most of it's rational uses the .260 is over kill and the .270 is over kill but dead is dead and they both do that quite nicely most of the time.
The real differences in common hunting cartridge comparisons lie at the trajectory at their respective effective ranges and their way-down range thump. And at their extremes, the .260 is a weinie compaired to the .270. As is the .270 compaired to the .338. Etc.
