I would say most bows shoot quieter,faster and nicer with low stetch strings.
Some do shoot softer,with good manners as well as quieter with B-50.
Thats my experince shooting alot of different bows and testing alot of different strings.
If you cant find a low stretch string that your bow will shoot well with or your unsatisfied with it because of noise,harshness etc.It never hurts to try a b-50 or b-55 and see if thats not the ticket for that particular bow.
Its cured a few bows for me over the years.
Sounds like its working for you compared to your former string.
Thier may be another high performance material and different strand count string that very well may shoot better than your currant B-50 for that bow of yours?Maybe not?
The quality of the construction of the string can make a difference as well.
The string can definatly make a difference one way or the other.