2023 QC has slightly warmer sound than 2025 QC, internals are also different
Internals:
NEW QC: https://drive.google.com/file/d/1x5CNzGetb43TGx6h6vONppt-o6pM_dN_/view?usp=share_link
OLD QC: https://drive.google.com/file/d/1UacyAU5uFZe8Wo8-3DHNOvQjSJyY-RhG/view?usp=share_link
raw audio
Old qc https://drive.google.com/file/d/19mAuxuZ9UbMRHchmSKShVzTlHo7KO-gL/view?usp=drivesdk
New qc https://drive.google.com/file/d/1Nvmeyze8DnslUJ6DjBhO5q5pPNkn1yj7/view?usp=drivesdk
Null test video showing low end rumble means old qc diffs on low end
Forgot what patch i used but its just an amp with a cab no other fx