My buddy who works at Kuliens tells me that a risk in using either is that if you get the leather waterproof enough, moisture can't get out any more than it can get in. When I had my Buffalos re-soled, I saw the sole leather and it was indeed cracked all around the stitch holes where the last was attached. I only ever used the LP on those boots. The solution, I think, is to use the Peet dryer to keep the inside as happy as the outside. I didn't have one for a lot of years, but I have one now. I definitely like the LP better. I always apply it with my bare hands; the warmth from my body heat is enough to make it pliable and absorb right. Another tip: apply the LP while the boots are wet. This helps force the water out, and absorb the grease better. Seems counter-intuitive but it works.