Advertisement picks for the 3d show holes in the inner gold plates and the outer black plates with beveling. Sharp looking chain. The ZVX3 shows holes in the inner plates only. Is it marketing?
I don't know.
The diff in weight is probably negligible but the D3 is probably stronger. The beveled outer plates prolly reduce weight as well as the lightening holes in the inner plates. The bevel prolly amounts to about -.25 ~ -.5 oz. I weighed the OEM DID chain which has no lightening holes and my ZZZ. Near as I can tell from my photos, the OEM chain was 114 pins and the ZZZ was 120 pins....so I'd say they are both about the same weight. The ZZZ is just built of thicker heavier plates and the lightenning holes are what's keepin the weight the same as a lighter built chain.
The ZZZ was 5 lb 11.9 oz, OEM DID chain was 5 lbs 10.6 oz.
have scale pics if you want me to post.