I read the description of the new journal PRResearch on the APS website, but I am still confused. APS publishes specialized journals, including PRA/B/C/D/E, for each major branch of physics, and journals with a broader scope and large impact, such as PRL and PRX.
My main question is: How is PRResearch standing in comparison with the specialized and lower impact PRA/B/C/D/E and the broader and higher impact PRL and PRX? What niche is it supposed to fill?
On one hand, PRResearch is multidisciplinary as PRL/PRX, and both PRResearch and PRX are full open access with publication charges, whereas the other APS journals are not full open access but only have open access options. On the other hand, as it is written on their website:
The acceptance criteria for PRResearch are aligned with those of other long-established journals in the family, such as Physical Review A, B, C, D, and E.