I can't tell from the photo either. But many times when shoes crease in this fashion, cracks are at least beginning. The only way you'll know for sure if it is just creasing or actual cracking is to put trees in them such that the whole forepart is stretched flat, or nearly so. Wipe them down good and then take a magnifying glass and look closely at the crease. Examine the edges of the creases. If they are cracking you will see a distinctive difference in the texture of the leather on top and the leather in the crease/crack. And you will see a sharp edge at the top of any crack. The leather in the crack/crease will also be dull. You might even sprinkle a little water on the affected area. If the leather is cracked it will, depending on how much wax/silicone has been applied, soak in. Now having said all that, some conditioning products do contain silicone and/or other chemicals (turpentine, benzine, etc..) that will hasten cracking....even if they don't mention it on the label. And all leather eventually cracks...there used to be an "old shoemaker's tale" that cracking such as this was due to floor level urinals. The point being that acids, acid rain, petroleum products, even road salt, etc....nearly everything, IOW...in the environment can be deleterious.