Can any La Bella Nickel round wound users give me their thoughts on tonality, lifespan, consistency from set to set of La Bella's nickel round wounds compared to D'Addario XL's? Also, how does La Bella's B-string compare to D'Addario's in these areas as well? I'm in the process of trying different strings on my 35" scale Ristola-6, and I'm a longtime D'Addario user, I just find their B-strings die rather quickly. Thanks