This is a very variable register of the clarinet in terms of pitch and tone quality.
Since they are short tube notes (made with note many holes closed) any change in your embouchure, tongue position or air pressure will be much more noticeable than it would be with a long note (meaning a note fingered with all the fingers down.)
Resonant fingerings have the additional benefit of making these notes more resistant and therefore more stable.
Most of the resonant fingerings also lower the pitch of the throat tones, which are often sharp.
In the throat tone range the clarinet can easily go from being very flat to very sharp on any note depending on how loudly the note is played.
F notes will tend to be flat and P notes will be sharp. Unfortunately many of the other instruments have the opposite tuning tendencies so any pitch change will be very obvious. Throat tones include the notes from G to Bb. Notes just below ( e and f) are also sensitive and often require correction of their pitch. E and F notes are often flat at mf or f levels. Opening the C# key will raise the E and opening the right hand Eb will bring the F note up to pitch.
There are two considerations for your choice of fingerings, the pitch and tone of the note and technical facility.
If the note is in a melodic context or last for a long time use the best fingering for tone and pitch. Always use the best sounding fingering that you can, even if it makes it a little harder. If the note it is part of fast passagework use the easiest fingering.
Though I am only talking about fingerings here don't forget not withstanding whatever fingering you use, having the optimum shape inside your mouth (syllable, throat and tongue position) cannot be underestimated.
Private performance April 14
PGSO April 21
Wind World Alban classical school show April 23 and 30