no blind tests, but I have had my 600 up front with my 350's and have gone back and forth with different music, they just seem to be more musical, tighter on the kick drum, etc... for movies the 600 goes much lower and has more explosive power.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85