Wooden needles are softer, warmer, and offer more grip than metal knitting needles. However, needles made from softer woods can dent and break after long periods of heavy usage. Metal needles tend to be more durable, and their slippery surface can lead to faster knitting speeds. Needles made from metals such as stainless steel are particularly durable and useful with hairy or fibrous yarns that can catch on small protrusions. This can make them better than wooden needles in these circumstances, which catch more easily. For this reason, metal needles are better for patterns that use hairy, delicate yarns and small needle sizes. Wooden needles are better if comfort is your primary concern. Ultimately, it’s down to your personal preference.