I had been a long-time Stingray player (like, 20 years) before I got my first Bongo. When I got it, I was like, "WTF is this?" It didn't sound right to me, it didn't feel right, it just was weird.
What I came to understand was that the Bongo really does sound different. When I first got mine, I just naturally dialed up the EQ knobs like I do on my Stingrays--but the Bongo was different and required different EQ than I was used to. The geometry is also different--it's shifted a little to the left, which at first felt weird but then I realized it totally facilitates playing the higher frets. Since the Bongo has 24 of them, the shift really is important.
Bottom line is that the Bongo is just a different beast. I happen to really love it, and I still love my Stingrays too--it's just a different feel and a different sound. Try Cobalts on that Bongo--they really compliment that basses sound, IMHO.
Tom