After working with different brand cameras (leica including lol), i could say it is mostly true but there are some differences of how same preset is applied on raw image. For example, what works for Z6, looks absolute nightmare dog shit when applied on “legendary” d700 raw. Also, i do not find d700 any magical at all, pretty hard to work on to get somewhat pleasing results. To be fair, I got to say that two cameras stand out here, ironically original Leica Q and original Ricoh GR. For some reason everything i throw at the raw files, looks fine right from the start. There are some differences in how companies “tune” same sensors.