Lulu on the left. RPGnow on the right.
The binding is tighter on the RPGnow version. So the cover pops open a bit when laying flat (RPGnow on the right)
The tight binding also causes it to not easily lay flat (RPGnow in the front)
So that is just a quick look at the differences. So you can make an educated purchase when you choose which place to get it from.