According to the Standard, there is only a half pound difference in the cocks and the hens have the same standard weight.
I've owned both breeds, but my Buckeyes were originally bought from a hatchery. So this may not really be a fair comparison. My Delawares mature faster than my Buckeyes did and they are much better layers and I prefer their meat. Plus I love the look of the Dels - the barring - even though I may never get that to Standard- and single combs.
I was very impressed with the vigor of the Buckeyes and their club members were so helpful and nice. I miss the club more than the Buckeyes!
Scott, what are the ages of the hens/pullets in your photos? They are big!