Here is a comparison of the preview of this book
http://store.kobobooks.com/en-nz/ebo...e-freedom-trap on the Mini with firmware 2.6.2 and the Glo with firmware 3.1.0.
The spacing difference is obvious, but the size of the chapter heading is different too. On the Mini the chapter heading is 38% taller than the first letter of the text, but on the Glo it is only 14% taller.
Edit: On second thought, the difference in font size might not be significant, the heading is probably supposed to be 125% of the text size (large vs. medium), but selecting the closest font size in pixels might just have resulted in rounding up on the Mini and down on the Glo.