Live use thin sound

quad user for 3 months and I get great compliments on the sound using my QSC Touchmix 30 system BUT when I have other sound techs using their systems they say the sound is thin boxed in overly compressed etc. I currently only use the presets and they complain whether preset is clean or dirty. I dont get it. my stock presets sound stellar
I run my volume at minimum of 50 no more than 70. 100 seems to have all techs asking me to turn down and its what is recommended by Neural DSP.
Anybody have ideas what might be goin on.

Have you checked for phase issues?

The Touchmix is a digital mixer? How are you amplifying its signal, and how does that differ from what other soundtechs are running? Are they running significantly louder levels?