DxOmark published the Panasonic S1R sensor Lab Test results. The camera performs very similar to the competition and earned the same A7rIII total score. There are some minor differences with the Sony:

PRO: Across much of the ISO range, the Panasonic S1R outperforms both the Nikon Z 7 and the Sony A7R III in color sensitivity, starting at a high maximum of 26.4 bits at a base of ISO 100, falling to around 15 bits at ISO 25,600.

CONS: The Panasonic Dynamic Rane never quite matches the range of the Sony A7R III, remaining around 1 stop (1 EV) lower throughout the ISO range.

Obvious answer :)

And it seems the market agrees with TheSlantedLens. The A7III sells a lot more than the Canon according BCNranking and on the Amazon US Best Sellers ranking (which is unscientific compared to BCN). And with the previous generation A7II with have an even cheaper RP competition ($999 with lens at Buydig, BHphoto, Amazon, Adorama and Focuscamera)

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SonyA7III at BuyDig, BHphoto, Amazon, Adorama, FocusCamera.

Dpreview:

This week Chris and Jordan do a side-by-side comparison between three high resolution mirrorless cameras: the Panasonic S1R, Nikon Z7, and Sony a7R III to see how they stack up. Which one is right for you?

The new Tokina 100mm f/2.8 FE macro lens is in Stock for the first time at BHphoto and Adorama.

Sigma deals:

Full Frame:
$125 off on the Sigma 35mm f/1.4 at BHphoto, FocusCamera, Amazon and Adorama.
$100 off on the Sigma 85mm f/1.4 at BHphoto, FocusCamera, Amazon and Adorama.
$100 off on the Sigma 50mm f/1.4 at BHphoto, FocusCamera, Amazon and Adorama.

APS-C:
16mm f/1.4 at BHphoto, Adorama, Amazon.
30mm f/1.4 at BHphoto, Adorama, Amazon.
56mm f/1.4 at BHphoto, Adorama, Amazon.

MC-11 autofocus adapter:
$100 off on the MC-11 Canon EF to Sony E-mount autofocus adapter at Amazon, Adorama and BHphoto.

Sony US superdeals

Sony cameras:
$1000 off on the Sony A9 at Buydig, BHphoto, Adorama, Amazon, BestBuy. FocusCamera.
$400 off on the SonyA7rIII at BuyDig, BHphoto, Amazon, Adorama, FocusCamera.
$400 off on the Sony A7rII at Buydig, BHphoto, Amazon, Adorama and Focuscamera.
$400 off ($600 off with kit lens) on the Sony A7II at Buydig, BHphoto, Amazon, Adorama and Focuscamera.
$150 off on the Sony 6300 at Buydig, Amazon, BHphoto, Adorama and Focuscamera.
$200 off on the Sony 6000 at Buydig, Amazon, BHphoto, Adorama and Focuscamera.
$150 off on the Sony 5100 at Buydig, Amazon, BHphoto, Adorama and Focuscamera.
$200 off on the A6000 dual kit at Buydig, Amazon, BHphoto, Adorama and Focuscamera.

FF E-mount lenses:
$100 off on the 12-24mm f/4.0 lens at Bhphoto, Adorama, BestBuy, Focus and Amazon.
$100 off on the 16-35mm f/4.0 Zeiss lens at Amazon, Adorama, BHphoto.
$100 off on the 24-70mm f/4.0 Zeiss lens at Amazon, Adorama, BHphoto.
$200 off on the Sony 24-105mm FE at BHphoto, Amazon, Adorama, FocusCamera, BuyDig.
$100 off on the 24-240mm lens at Amazon, Adorama and BHphoto.
$25 off on the Sony 28mm FE lens at Amazon, Adorama, BHphoto.
$50 off on the Sony 28-70mm FE lens at Amazon, Adorama, BHphoto.
$100 off on the 28-135mm PZ lens at Amazon, Adorama and BHphoto
$100 off on the Zeiss 35mm f/1.4 lens at Amazon, Adorama, BHphoto.
$100 off on the Zeiss 35mm f/2.8 lens at Amazon, Adorama and BHphoto.
$100 off on the Zeiss 5omm f/1.4 lens at Amazon, Adorama, BHphoto.
$50 off on the Sony 50mm FE f/1.8 lens at Adorama, BHphoto, Amazon, Focuscamera.
$50 off on the Sony 50mm macro at BHphoto, Adorama and Amazon.
$100 off on the Zeiss 55mm f/1.8 lens at Amazon, Adorama and BHphoto.
$50 off on the Sony 85mm f/1.8 FE at Buydig, BHphoto, Amazon, Adorama and Focuscamera.
$100 off on the 70-200mm G lens at Amazon, Adorama and BHphoto.
$100 off on the 70-300mm lens at Amazon, Adorama and BHphoto.
$100 off on the 90mm macro lens at Amazon, Adorama, BHphoto.
$50 off on the Sony Fisheye Conversion Lens for FE 28mm F/2 at Amazon, Adorama, BHphoto.
$50 off on the Sony Ultra-Wide Conversion Lens for FE 28mm F/2 at Amazon, Adorama, BHphoto.

Patrick Murphy-Racey:

At this point, in April of 2019, Real Time Tracking (RTT) is available in four camera bodies: a6400, a7III, a7RIII, and the venerable a9. RTT works best, as does everything else, on the a9. RTT combines all the traditional AF elements like distance, contrast, and phase detection but then adds into this mix, face detection, eye AF, color, and pattern.

The end result is amazing, allowing you to simply depress the shutter part way while pointing the camera at your desired subject (person, athlete, horse, car, motorcycle, etc.), then the A RTT system will track your subject anywhere in the viewfinder while you are shooting. You simply shoot when you want to and the camera takes care of focus.

This allows shooters to experience a new freedom never before possible so that you can just concentrate on content and moments, and then nail everything.

I recommend experimenting with sensitivity (1-5), depending on your sport of choice or assignment. I use 5 almost all the time for auto racing. For American football and basketball, I drop it down to 4. for tennis singles, 5, but for doubles, 3 or 4.

Dpreview just published the full Sony a6400 review. The camera earned the Gold Award and this is what the DP team writes:

Senior Editor Barney Britton says:

The story of the a6400 is really all about the autofocus system. With a high-quality lens attached, the a6400 is a dream camera for casual portraiture. I don’t love the ergonomics, but when you hardly have to fiddle with any buttons to get the shot, these sorts of handling frustrations matter much less.

Science Editor Rishi Sanyal says:

The a6400 is an unprecedentedly capable camera for its price point. Parents, enthusiasts and pros alike will appreciate the class-leading pro-grade AF system that’s also simple enough to use you can just ‘set and forget’. Image quality is up there with the best. Detailed 4K video and easy tap-to-track autofocus makes for a compelling run-and-gun video camera, though you’ll want to stick to stabilized lenses. To sum up: the a6400 truly impresses and is arguably more capable than many cameras at far higher price points. My only concern is its usability: I often find myself using it more as a point-and-shoot, although this isn’t necessarily a bad thing.

Sony A6400:
USA at BHphoto, Adorama, FocusCamera, Buydig, Amazon.
Europe at Calumet Germany, ParkCameras UK, Jessops.
Asia at Sony Australia and Sony Japan.

CameraSize published this size comparison between the new Tokina 100mm f/2.8 macro and the Sony 90mm f/2.8 macro. We still have to see if the Tokina is a match for the superb Sony. All we know yet is that the Tokina is $400 cheaper.