Yes they are essentially the same reader. There is only 1 manufacturer of the e-ink screens.
Cool-ers like most ereaders don't handle reflow on PDF's very good. I took some pics of the PDf you asked about.
There were some reflow issues here and there with it. I am not sure how helpful it would be to read that magazine as the print size is small.
I also noticed the transfer time on this file was rather slow as it was much larger than the average ebook file size.