I wish I had more experience tasting all of the varieties of myrciaria...to be honest I've never even tasted the fruit of a true M. cauliflora....the most common form I've seen in USA is Paulista (it makes large fruits).
I hear the fruits are just like M. jaboticaba ...but generally have a slightly more acid taste (still can be sweet)....and M. jaboticaba is well know for always being sweet...not much acidity.
I believe they are similar in their bearing habits.
also there are many forms of M. cauliflora..I think more so than M. jaboticaba...and the variations of fruit in M. cauliflora can be drastic...with different sizes, flavors, and thicknesses of skin.