Is the Nikon D3x smaller than the Nikon D3s?

Is the Nikon D3x smaller than the Nikon D3s?

What do you mean?

They are identical cameras with different sensors and electronics.

The D3X is a studio camera designed for shooting products, fashion and other commercial subjects

The D3S is a sports and editorial camera for shooters who need low noise at very high ISO settings, like 6400 and higher

From the Nikon website.

D3X

Width 6.3 in. (159.5mm)
Height 6.2 in. (157mm)
Depth 3.4 in. (87.5mm)
43.0 oz. (1, 220g)

D3s

Width 6.3 in. (159.5mm)
Height 6.2 in. (157mm)
Depth 3.4 in. (87.5mm)
43.7 oz. (1, 240g)

As you can see, while both are the same "size", their weight is slightly different