Twitch is great for live streaming, especially for gaming, eSports, and real-time interaction with streamers and communities. It's ideal for live chats and engaging with audiences during events or gameplay.
YouTube is better for pre-recorded content, tutorials, vlogs, and a wide variety of video categories. It offers a more extensive library of videos that you can watch on-demand.
If you want live interaction, go for Twitch. If you prefer a vast selection of on-demand videos, YouTube is the way to go.