Yes, there can be differences between different brands of black fiberglass tissue. These differences may include the quality of the fibers, the thickness and uniformity of the tissue, the level of impurities, and the overall durability. Some brands may use higher quality raw materials or have more stringent manufacturing processes, resulting in a superior product. Additionally, the performance of the black fiberglass tissue can vary based on the specific application, such as in insulation, reinforcement, or acoustical purposes. It's important to consider the specific requirements of your project and choose a brand that meets those needs.