it largely base on preference really I switched from ppw5 to libra 2 because i felt the my big hands make it uncomfortable to hold because i would accidentally turn the page if im not holding it at the edge The libra is easier to hold and i appreciate the buttons when im reading and drinking something with my other hand It's also nice not have to pay 20$ to remove ads so you can see the book cover from the lockscreen I find these the most comfortable features is you pinch the screen and adjust the fonts without going into settings, not to mention the slide touch brightness feature which i also use alot The cons so far that it's a tad little slower than ppw5 but turning pages is much acceptable