There are a few factors to consider when trying to determine which product is better for high temperature applications. The first factor is the melting point of the material. The higher the melting point, the better the material will be able to withstand high temperatures. Another factor to consider is the thermal conductivity of the material. This measures how well heat flows through the material. The lower the thermal conductivity, the better the material will be at insulating against high temperatures. Finally, you need to consider the expansion coefficient of the material. This measures how much a material expands when heated up. The lower this number is, the less likely it is that your product will warp or break under high temperatures. With all of these factors in mind, some materials that would be good choices for high temperature applications include quartz, beryllium oxide, and alumina ceramic.