Depends also on your listening levels. The DSP33C has limiter circuitry present and when called upon to produce sharp loud sounds, like the gun shot sequence in Heat, it cannot match the output levels of its bigger brother.

It's drivers are smaller than the 5ks and to prevent damage/clipping, the DSP kicks in and limits the output. This really took away the impact on some movies at about -10dB in a 4x3m room.

Keep your 5K if you can.

Chris
Srces: Wiim Pro | OSMC Vero 4K+
Procs: HD621 > G61R > Minidsp DDRC-88D
Spkrs: 7200.2 + 5KC + 5Ks | iNuke6K > USC15 | iNuke3K > 2 x Crowson T108SS
Video: JVC HD950 & 1.9m React3 2.4:1 screen
Room: 5.8x2.8m | Various GIK Panels