Galaxy Note 2 is a phone. What did you expect? I prefer reading PDFs on my excellent NEC 27" monitor. Mini might be better than Note 2 for PDFs but it's inferior to Nexus 7, Kindle Fire HD and many other 7" tablets.
Galaxy Note 2 is a phone. So? I make phone calls with my iPad Mini. So?
So I can't compare the screen on an iPod Touch 5 and iPhone 5 just because one is a phone and the other lacks cellular?
We are comparing screens and readability on portable devices.
I got the 5.5" Galaxy Note 2 to replace my 7" Android tablet. The note 2 has a higher resolution than my Acer iconia 7" and my iPad Mini.
Just because the Galaxy Note has higher ppi and higher resolution, doesn't mean it's makes it better for reading. You need to considered size and aspect ration of the screen also. That was what I was pointing out.
It's a combination between size, weight, ppi, and aspect ratio when considering a portable device for reading.
I prefer to read PDFs on an iPad 4 over a 27" monitor any day. Having to sit on a chair and read on huge screens like a 27" and 30" makes my neck hurt. Text is much shaper on an iPad 4 too.