Eb Alto Saxophone C#4 accuracy.

Eb Alto Saxophone has some issues in the software (and website) where a C#4 has a 'soft' sound like the notes above it. On a real Alto Sax, a C#4 has a 'straighter' sound like the pitches below it. I do understand that synthesizing saxophones is a lot harder than other instruments. Aside, this is an annoying issue, especially when creating chords with other saxophones. Are there any other instruments that have note 'tone accuracy' issues? This is a problem with both SoundFonts, the default and the font for pre-Musescore 2.0.