This is the Wacom One Pen for the Wacom One (Gen 2) tablets. Wacom also shows this on their site as the "Wacom One Standard Pen".
I will refer to this pen as the "Wacom One Pen (Gen 2)"
All the Wacom One (Gen 2) tablets are compatible with the new Wacom One Pen (Gen 2).
This is good. It eliminates a huge source of confusion around pen compatibility.
One by Wacom (CTL-472, CTL-672) -> Wacom Pen 2K (LP-190K)
Intuos (CTL-4100*, CTL-6100*) -> Wacom Pen 4K (LP-1100K)
Wacom One Pen (Gen 1) -> CP91300B2Z
Wacom One Pen (Gen 2) -> CP92303B2Z
One by Wacom (CTL-472, CTL-672) -> 2048
Intuos (CTL-4100*, CTL-6100*) -> 4096
Wacom One (Gen 1) -> 4096
Wacom One (Gen 2) -> 4096
So no improvements to pen pressure levels. As a reminder, all you really need are 2048 pressure levels and it is the pressure range that is more important.
New pen (CP-923) -> 2 buttons
Old pen (CP-913) -> 1 button
New pen (CP-923) -> supports tilt
Old pen (CP-913) -> does not support tilt
New pen (CP-923) -> Does not work with Wacom One (Gen 1) (DTC-133) tablet
Old pen (CP-913) -> Does work with new new Wacom One (Gen 2) tablets
I confirmed both pens (CP-913, CP-923) work with the Samsung Galaxy S8 Ultra.
I confirmed that the Samsung S Pen works with both the Wacom One (Gen 1) tablet and the Wacom One (Gen 2) tablets
The CP-923 pen has issues with low pressure. See this video: https://youtu.be/415ngQOHiME
The CP-913 does not have these issues