Don't know technical info about Balsamic but I know it is the fad ingredient.
I came to the conclusion ages ago that the more expensive aged longer(15 years) I only used on fisished fish dishes or French and European mild dishes, it was not strong enough to do much else with.
Now I but one 4 year aged which I use to make vinaigrettes and dressings and a 10 year aged one to use on finished dishes and that seems to work well for me.
Happy to learn more so if anyone has more info...
YMMV because I do a lot of strongly spiced cooking too..