I didn't mean anything by it, but further into the thread discussions were swaying to potential for misunderstanding of the original comparison by later reader/posters. That happens.
My sentiments also are not tied to velocity, but to OVERALL potential out of cal (26-vs-27).
Competitors, long or short, follow bullets, then brass. You may notice they don't use odd cals(23, 25, 27, 29, etc) and it's because of best bullets available in 22, 24, 26, 28, 30, etc.
And while the 270Win is far more powerful than a 6.5x55, the latter is perfect capacity for the best in 26cal bullets(~140gr), and it's case is better designed. It can run faster powder, higher pressure, for better accuracy, and out-live the 270 cases. Much because of the 6.5x55 smaller chamber area and steeper shoulders/less body taper(more improved).
But then, I'm a pretty opinionated rascal..