just a tad more deep bass..
wider soundstage.. and breathing space on each instrument though the RS1i already has a good instrument separation for me but being exposed to flagship cans hehe sometimes left me desiring these on the RS1i but nevertheless, the RS1is are already very very good at their price range for me on presentation and everything.. very transparent. the PS1000 just gave me more listening bliss and is exactly the answer to some of my gripes then ...
No you still can't have my RS1i.
PS1000 still burning in