Gator is nonporous and doesn't need buffers. The method of manufacture is completely different from ordinary paper-faced fomeboard. You can simply pull up the tech sheet on their website to read about this. Its properties are very well known. It is also more moisture and warp resistant, but for that very reason won't work for wet mounting. Another high-quality option is Ultraboard, then you go way up the price scale
into aluminum-faced boards like Dibond. Ordinary art store fomeboard has its presentation limitations regardless of whether it's buffered or not. It warps easily and leaves a lot of "orangepeel" with glossier prints, because it is quite uneven. The best quality conventional fomeboard is
called Mighty-Core, but it is not related to Gator either.