I've had a couple of Bibles rebound in both the buttero and lambskin liners. It depends on what you're wanting, but personally I prefer the lambskin. It feels great––soft to the touch and makes the cover much more supple. But if you don't really like supple, the buttero is the better choice for you. Buttero is especially good for larger Bibles. However, I have the lambskin liner on a couple of larger Bibles and absolutely love it!