Benchmark ABH2 compared to Merrill Element Series and other ultra high end amps

The Benchmark ABH2 has received enthusiastic reviews from a number of sources as have the Merrill Element series of amplifiers.  Both are lauded for their low background noise, transparency and neutrality.  However the Benchmark amp, even allowing for its lower power rating, is a fraction of the price of the Merrill Element Series even when one uses two in a bridged monoblock configuration.  Has anyone directly compared the Benchmark ABH2 to the Merrill Element amps or other ultra high end amps such as Soulution, Constellation, etc ?