Thanks for the reply, it was certainly helpful. Great to see more BKP faces around here recently, I really like it.
I did however mess up what I meant about the pole pieces. I did not really mean the spacing in the regular sense (as in 50mm or 53mm spacing), but rather how close the two rows of pole pieces are to each other. I have no experience with soapbar sized HBs, but I would think that they would be closer together and therefore effect the tone.
Also, do you have an idea in which way they sound different? I really am a sucker for knowing these details. Not that it will matter for anyone in a real live situation, but I am just curious about these things.