Hi Vyshakh! I think the correct answer to your question has to do with your use of the instrument. If you’re playing viola in a quartet, there’s nothing that will replace the sound of an actual viola. If you’re using it primarily to teach, having the C string available on your violin to demonstrate is very helpful.
I personally play a 5-string violin because I teach both violin and viola. I’m originally a violist and have been playing for over 24 years. More recently I’ve picked up more and more violin students and found myself at an impasse with always missing a string when trying to demonstrate to the student. Michael has a fantastic 5-string acoustic instrument available to try out, if you’re interested to see what it’s like.
This is my personal instrument and it has an absolutely beautiful tone throughout the entire register. You would never mistake the instrument as a viola, but it has a surprisingly strong tone on the low C – much more rich than other violins of its type.
If your primary instrument is viola instead of violin, another option would be a 5-string viola (which Michael also has the ability to order as-needed). It will sound like a viola and give the high E-string a unique quality. Again, it would never be mistaken as sounding like a violin, but it would give the extra high range.
Please let me know if I can help answer any questions you might have about it.
Violin Tutor Pro Instructor