Since Rob is counting Prius's I will tell you my opinion, and my opinion only!! For a blade up to say 7-8 inches I prefer a satin, or comp finish where the preparation of food may come into play. There is less drag and resistance with a satin or comp finish, also if the knife has been used extensively with the coating applied-some may separate-get into food preparation. On larger knives - 8 inches or above which are going to be used for chopping, clearing Brush and attacking Prius's, it does not matter. The coating does provide an added measure of rust resistence. On SR-101 of any size, get the coating and leave it on! Either one (knife) will provide you an outstanding tool to use. Infi is very rust resistant, Just coat her with a light application of oil after use.