On average, a silver compound will hang a few degree's C lower than a compound that is composed of grease. Reason, metal conducts heat better, but its not as conductive, as true metal. In fact, both greases and silver compounds and such conduct alike. But if your temps are a huge issue, get a silver compound, they are formulated to align during bonding, which helps create a much easier transfer of heat. its only a dollar or so more, and its all I use, I'd go for it.