Look at the the two attachments. Same font, one is a nook STR and the other is a 950.
https://www.mobileread.com/forums/att...1&d=1309712007
https://www.mobileread.com/forums/att...4&d=1308939746
Now the nook has noticeably thinner lines. Now look at the r and notice how the overhang is too thin. The top of the m is thin. One the 950, the font has more uniform strokes. It is the same font, but when actually comparing them on a nook and a 650 directly, they almost look like they could be two different fonts or different font weights.