Ok, so out of the following pairs, which one do you think is the better built:

1. Nikon Df vs D850

2. Olympus Em5 ii vs Em5 iii

3. Olympus Em5iii vs Em1

4. Nikkor 20mm f3.5 (1967) vs Nikkor 20mm f2.8 D (1994)

5. Zeiss Milvus 35mm f1.4 vs Sony 35mm f1.4 GM