Thanks for this Havoc!
I like the Sony better on your daughter's photos, but prefer the Nikon on your son. I think it would look even closer if the WB was matched.
The Fuji 56 f1.2 gives a rendering like the Nikon with the 85@.1.8.
I'm waiting for the A6??? With this BSI sensor.
The second set with my son is with the Nikon 85/1.8... In the first set, son and daughter, it was the Tamron 24-70/2.8. I accidentally had the shutter speed too high (had it set for the 85 which isn't stabilized so I crank up the shutter speed), resulting in higher ISO shots for my daughter, which may have impacted the comparison slightly.
Of note, it is interesting how differently both cameras process WB side by side. Nikon can go a bit too magenta at times, but overall, is more accurate. The Sony on the other hand, especially indoors, can really really muck up the white balance. The Sony also meters darker than the Nikon. In portraits, I often have to bring down highlights on the Nikon, while the Sony needs an exposure boost.
Fuji certainly has some great lenses. Unfortunately, Sony saves their great lenses for the full frame sensor. Of course they are compatible with the A6000, but bigger than they would be if they were just APS-C. I do find the 50/1.8 to be a nice small good quality lens, but it would certainly be nicer (and much more expensive) at 50/1.2!
This test reinforces a few things for me:
-Nailing focus is the most important thing. The Sony system, with eye-AF, is a real big selling point, and can result in better images at times, by making it easier and more consistent to nail focus.
-The full frame advantage is definitely still worthwhile for an enthusiast or pro. Not a necessity, but real value. The narrower depth of field. And the ISO difference still looks like more than a stop to me. Shooting in outdoor sunlight, no real difference. But I was doing some test shots just around ISO 1600-3200. 3200 on the D750 was almost entirely clean. No *need* for noise reduction. If you pixel peeped, you could use a tad of luminance NR. At around 2000 on the A6000, you absolutely needed NR.
-Lenses make the most difference. The D750+85/1.8 performed best. But the A6000 with a prime (the good but not great 50/1.8) could largely match the D750 with a great zoom. And while the Sony 10-18 is considered "good for a consumer zoom), it really doesn't totally meet my standards. Considering the size and convenience, and it can still produce good images when you aren't pixel peeping, I'll keep it around for some personal use.
I really wish Nikon would produce a cross between the D750 (their AF tracking know-how, their lens system, their flash system, the D750 24mp image quality), the A6000 and the A7rii (mirrorless, fast, responsive, wide AF coverage, eye-AF).