The new RX10m2 uses the same 1inch stacked sensor as the RX100m4. This means slow motion capability, resolution, 1/32.000 shutter speed and 4K capability are the same. See the full RX100m4 SAR report if you want to know more about those features. So let’s just see the differences between the RX10m2 and RX100m4:

The RX10mw uses a 24-200mm f/2.8 Zeiss lens (same as previous RX10).

AF performance of the RX10 II reaches speeds as fast as 0.09 second⁹. To help you capture momentary shutter opportunities without fail, the adaptable lens also provides the rapid, reliable Direct Drive Super Sonicwave Motor (SSM) for smooth and highly precise focus driving that works together with Fast Intelligent AF.

The RX10m2 records up to 14fps compared to the 16fps of the RX100m4.

RX10m2 image samples can be seen at Sony.net. Videos can be seen here:
RX10 II – High Precision 4K on Youtube.
RX100 IV & RX10 II – Super Slow Motion- Insects on Youtube.
RX100 IV & RX10 II – Super Slow Motion- Children on Youtube.
RX100 IV & RX10 II – Super Slow Motion- BMX Air Turn on Youtube.
RX100 IV & RX10 II – Super Slow Motion- Apple & Water on Youtube.
RX100 IV & RX10 II – Super Slow Motion- Snowboarder on Youtube.
RX10 II – Product Design | Cyber-shot on Youtube.

Store links:
In USA:
A7rII at Amazon, BHphoto, Adorama, Uniquephoto.
RX10m2 at Amazon, BHphoto, Adorama, Uniquephoto.
RX100m4 at Amazon, BHphoto, Adorama, Uniquephoto.
In Europe at:
A7rII at Sony DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m4 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m2 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
In Asia at:
A7rII at Digitalrev, CameraPro.
RX10m2 at Digitalrev, CameraPro.
RX100m4 at Digitalrev, CameraPro.

The new Sony A7rII autofocusing system marks a new high standard for third party and A-mount lens support:

Dpreview writes:

PDAF will work even with third-party lenses via existing adapters, including in continuous AF tracking mode.  This is potentially a huge deal – especially for Canon users. We’ve used an a7R II with a [shoplink 37334 ebay]Canon 24-70mm lens[/shoplink] and a Metabones adapter, and focus is indeed very fast indeed. We’ll be looking at this in more depth as soon as we have a production sample camera, but for now, we’re highly impressed. 

Sony correctly recognized that they need to add high quality autofocus support for Canon lenses if they want to gain Canon customers!

Sony press text says:

Additionally, the focal plane phase-detection AF system on the α7R II works well with Sony A-mount lenses when they are mounted on the camera using an LA-EA3 or LA-EA1 mount adapter. This allows users to enjoy the wide AF coverage of 399 focal plane phase-detection AF points, high-speed response and high tracking performance with a wider range of lenses. This marks the first time that the AF system of a mirrorless camera can achieve high performance with lenses originally designed for DSLRs.”

The A7rII is certainly the best “A-mount lens friendly” camera yet. I can’t wait to see a focusing performance comparison between the A99 and the A7rII. If the A7rII is really as good as Sony marketing says well….I will let you guess what this could mean for the A-mount system future…

Store links:
In USA:
A7rII at Amazon, BHphoto, Adorama, Uniquephoto.
RX10m2 at Amazon, BHphoto, Adorama, Uniquephoto.
RX100m4 at Amazon, BHphoto, Adorama, Uniquephoto.
In Europe at:
A7rII at Sony DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m4 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m2 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
In Asia at:
A7rII at Digitalrev, CameraPro.
RX10m2 at Digitalrev, CameraPro.
RX100m4 at Digitalrev, CameraPro.

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[shoplink 37319 ebay][/shoplink]

The RX100m4 is a hell of a nice camera and it’s packed with lot of great features. Here is a short highlight on some of them:

1) It’s the world’s first memory-attached 1.0-type stacked CMOS sensor

2) up to 40x super slow motion (movie recording of up to 960fps)

3) super-high-speed 1/32000 sec

4) Anti Distortion shutter:

5) 16 fps

6) 4K recording

Store links:
In USA:
A7rII at Amazon, BHphoto, Adorama, Uniquephoto.
RX10m2 at Amazon, BHphoto, Adorama, Uniquephoto.
RX100m4 at Amazon, BHphoto, Adorama, Uniquephoto.
In Europe at:
A7rII at Sony DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m4 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m2 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
In Asia at:
A7rII at Digitalrev, CameraPro.
RX10m2 at Digitalrev, CameraPro.
RX100m4 at Digitalrev, CameraPro.

Sony decided to allow preorders of the three new camera starting from June 17 at 16.00 London time (confirmed via BHphoto). In other timezones this means:
8am Los Angeles time
11m New York time
17:00 Berlin time
24:00 Tokyo time.

Store links:
In USA:
A7rII at Amazon, BHphoto, Adorama, Uniquephoto.
RX10m2 at Amazon, BHphoto, Adorama, Uniquephoto.
RX100m4 at Amazon, BHphoto, Adorama, Uniquephoto.
In Europe at:
A7rII at Sony DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m4 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
RX100m2 at DE, FR, IT, ES, NL, BE, CH, AT, SE, FI, NO, PT. Wex UK.
In Asia at:
A7rII at Digitalrev, CameraPro.
RX10m2 at Digitalrev, CameraPro.
RX100m4 at Digitalrev, CameraPro.