See you are confusing the animation with what iBooks does on iPad. On iBooks for iPad you can grab a corner of a screen and literally pull the page over, part way, back and forth, bend it, etc like a real page of the book. It isn't an animation.
Wow, dealbreaker right there :/
Sorry cheebs, nit singling you out specifically, but arguing about which app is better for reading books based on whether you can accurately simulate pulling the corner if a page is just silly IMO.
No mention of delivery/sync either. I find being able to email documents to kindle is invaluable.
this is only even an issue if you want to read books on iphone/ipad only. If you want to read on other smartphones, pcs, e-readers then you need the kindle app.
Although best solution would be to use epub format only and then you have more flexibility to choose
Btw, no mention of the overdrive app that lets you borrow directly from your local library?