Both carbon steel and stainless steel are long-lasting. Stainless is better for you because it won't rust so easily. It's also much more tender to use mainly as a secondary knife than carbon knives which can be brittle. The stainless blade will hold its edge way longer, whereas blades made from Carbon Steel will lose their hardness over time making them soft feeling when sliced with today and the next day consequence may turn out double cutting (blunt) knives.