this has probably all been said already
One way in which the 2013 Cybermen are a bit more faithful to Classic’s than the 2006 Cybermen were, can be identified by looking at the limbs.
2006’s Cybermen seem to have limbs made from black/dark grey fibres, guarded by several metallic tubes and cones - which don’t conform to the shape of the limb, and either stick out or flare out at the ends, resulting in the Cybermen seeming very angular and mechanical.
If you look at Classic Cybermen, obviously it’s in part down to the cheapness of the costumes, but if you look at the arms or legs of pretty much any Classic version, it’s just the material (which might be tight or a bit baggy, plus maybe some tubes or padding). The human form isn’t very obscured by any big metal bits, they look like people. And that’s kind of creepy, isn’t it
Rest under the cut because man I need to stfu.