253 looks smoother.
all root apps also work with 253. rootexplorer, tit-backup, ssh server etc.
But I think there is a bug in 253.
Even powersave mode are off, sometimes push msgs won't delivery in time, sometimes internet call won't wake phone up.
e.g.
1) Line msg always won't delivery no notification, those msgs will delivery only when I open Line.
2) During screen off, Line call and Google hangouts video call won't wake phone up and won't show incoming call... But will notify there is missed calls
Sometimes also no notification at all, need to open Line or Hangouts then find that there are missed calls!
It won't happen in ordinary phone call.