Vandoren BD4 HD vs Vandoren BD5

Both mouthpieces are 13 Series. I played the same reed—Pilgerstorfer Morre French Cut. The reed was 4 strength but adjusted to be softer, though it is still a bit harder for BD4 and a bit softer for BD5. Please take this video with a grain of salt. The camera mic isn't good, and I didn't have time to practice last time. -------------- You can support me on https://boosty.to/clarinet-playing