While I'm sure others probably have other things to say about it, from my experience with boas I didn't really consider them to be like large ball pythons. Of course, every individual snake is different, and every breed has its own characteristics that need to be accounted for.
The two youngsters that I had were very active, liked to stick their heads where they didn't belong, and had a FEROCIOUS feeding response. While they were docile and fair mannered when handled, they sometimes had a little more spunk than even the burmese that I was fostering. I've had 3 bps and each one has been a polar opposite from the other, but I still don't think any of them were comparable to the RTBs that I had.
I do need to say that the RTBs that I fostered came from a pretty stressful environment, but I think that for their history they were very well mannered.