The main difference between Logun Capsule and Logun Forte is their probiotic potency: Logun Capsule contains not less than 15 billion CFU per capsule, while Logun Forte contains not less than 45 billion CFU per capsule. Both contain similar probiotic strains, but the higher CFU in Logun Forte makes it stronger. Based on your medical needs, your doctor will advise which one is appropriate, so it is advised not to switch or take one in place of the other on your own.