RG to PS really isn't apples to apples either, but closer. That said, I listened to a Chang Lightspeed product and an RG 400 in my system and found that, sonically, the Chang did more to increase openness & spaciousness, but the RG did more to increase dynamics (micro & macro) and also opened things substantially tho not as much as the Chang. Both products made nice improvements but I bought the RG 400, mainly because I really liked the improved dynamics & was willing to sacrifice the nth bit of spaciousness. (My system consists of JMLab Daline 6.1's, Cary CAD 300B amp, Melos MA-333 preamp, EAD transport & DAC, and VPI HW19III Benz M09 cartridge, Kimber Select cables). "YMMV"
