so I put baby bear up for sale the other day
and bought… baby bear II?
what’s the difference? the hadean is sold through rondo music and has a really good reputation among the u-bass crowd. the first thing i noticed is it’s a lot heavier then the kala, which I realize is like saying a squirrel weighs more than a mouse. but it is very noticeable. the hadean tuners are terrible compared to the kala. when i got the hadean, the A string was almost inaudible compared to the other strings, this is a common problem on U-bass piezo pickups (and on many piezos in general). this also happened to me to a lesser degree on the Kala. there is a fix floating around out there; however, i couldn’t do it on the kala because it has a different piezo setup then the hadean. but I could do it on the hadean, and like a lot of u-bassers report, it works!
and of course, the hadean isn’t made out of koa wood. soundwise the hadean might roar even a little more than the tiny kala did. any other differences, none that i can think of. oh yeah, one more - it retails for almost a grand cheaper 
so the kala is up for sale currently on my reverb page if anybody wants to take a look. I made the switch because i need the funds to pay for something i’ve got coming that i’m super excited about, stay tuned.