Unicode 15.1 repertoire

[James Kass]

Unicode 15.1 is scheduled to be released September twelfth.

According to this page,
https://www.unicode.org/charts/PDF/Unicode-15.1/

... CJK Extension I adds 622 new characters.

But according to the chart linked from that page,
https://www.unicode.org/charts/PDF/Unicode-15.1/U151-2EBF0.pdf

... there are only 603 additional characters.

Which one is correct?  If the 622 figure is right, is there a chart 
showing the additional 19 characters?