If they have the same white paper, then they are the same coins, and why should care about the coin plagiarism andnow about the whitepaper. For example, you think BTC and BCH should have a different whitepaper? They only have a different block size, but is the same thing.
of course This is the case, but these coins is not universal. The white paper is also a dimension for everyone to read.
The high text similarity of the white paper is also reflecting some phenomena, and there are many white papers with high similarity.
The rightmost number is the text similarity of the white paper.
http://ww1.sinaimg.cn/large/604902cdgy1fvduije7idj20m307ojs0.jpg