"D600 Weights 90g More Than K-5II"

• Nikon D600 is 8% (10 mm) wider and 16% (16 mm) taller than Pentax K-5 II.
• Nikon D600 is 13% (9.5 mm) thicker than Pentax K-5 II.
• Nikon D600 [850 g] weights 12% (90 grams) more than Pentax K-5 II [760 g] (*inc. batteries and memory card).
  
  
• Nikon D600 dimensions: 141x113x82 mm (camera body only, excluding protrusion)
  Pentax K-5 II dimensions: 131x97x72.5 mm (camera body only, excluding protrusion)

Source Link: Camera Size.com

The weight advantage of the Pentax APS-C DSLR has been diminished! For 90g more, we can carry a FF DSLR instead! :-o