As promised, I tested a version 2 of the paper and this is the outcome:
Paper whiteness is slightly less than the previous (v1) , and known under different brands.
L 98.6 -vs L 97.3 , the a and b values are about 0 (for the v1 the a and b values varied a bit per badge like between 0.0 and (-) 0.1, the L value between 98.0 and 98.6)
Also apparently less OBA
The White-2-Black curve (measured with a step-wegde linear Lab steps of 2%, printed from Lightroom - with the new profile and Relative Colorimetric) is identical. Again this varied a bit between the badges of the v1.
The colour behaviour and the "volume" of the profile is quite similar.
The surface texture is a bit more pronounced, the sheen more satiny-mat i.e. bit less shiny (very small specks?)
My printer Epson SCP9000 did have problems with cutting the paper, at the same time not so with the v1.
Note: I did not test the v2 with a v1 profile.