I don't understand the table under Benchmark Results. To compare the quality of two toolchains, the device architecture needs to be the same. "LUT6" vs "LUT4" doesn't cut it, there's much, much more to the architecture of an FPGA than the width of its look-up tables [1], and even for the "LUT6" category, I see four different devices.
[1] Consequently, there's more to FPGA synthesis than LUT mapping, so take the reported results with a huge grain of salt.
[1] Consequently, there's more to FPGA synthesis than LUT mapping, so take the reported results with a huge grain of salt.