The last 6 years is a rather curious time frame. Even so, over the last six years Damon's averaged a 114 OPS+ and Cameron's averaged a 111 OPS+. No matter what sample size you use, they're similar offensive threats.
And just as an aside, it's incredible how consistent Cameron has been. He's averaged a 111 OPS+ over the last six years, he had a 111 OPS+ last year and a 111 OPS+ the year before.