I am of the opinion 30-06 to 338 caliber being a clear step up.
I have a couple of Creedmoors, and really enjoy them. Am I emotionally attached to them? Heck no. But I enjoy all of my rifles from 222 to 416.
I will admit to having an attachment to the 270 Win and 338-06, and disdain for the 243 Win and 7mm Rem Mag.