wondering why a c2c blanket is not as heavy as if it was dc rows

Hi,
I have a corner to corner rectangle blanket and I have a rectangle blanket done in regular dc rows. Both the blankets are the same length but the one done in reg. dc rows is 6 inches wider except on the corners it's 6 and a half inches wider and it's heavier than the corner to corner blanket. I don't think it should be that heavier! Is there a reason for this why the corner to corner is not as heavy? I think if the blankets were the same size in length and width then the c2c wouldn't be as heavy as one done in reg dc rows. What do you think?

It could be the difference in yarn, hook and tension. Also in a rectangle blanket you have more DC per row then you would have in a C2C blanket. I don't know for sure why your blankets would be different in weight but that would be my guess.

Spoula