I have played these two sets for at least half a season each in the past and I will say that in terms of forgiveness i230 > BPS. I don't think it takes a rocket scientist to come to that conclusion lol. i think the more interesting trade off happens if you consider other factors like handicap, feel/looks, turf interaction, etc because I def enjoyed playing the BPS more than the i230s. I think for the elite ams and scratch-ish handicap golfers, where the swings are much more consistent, it is the BPS all day every day bc i dont think giving up the feel and turf interaction of the BPS is worth the amount of forgiveness they would gain playing the i230, bc they dont need it.
My overall scores and stats with the BPS were a little worse than when I was playing with the i230s. So for me as a 6 hdcp that is currently more focused on shooting lower scores, i230 over the BPS. But if one day I don't care about the scoring as much and want to play with some that feels and looks great, while not giving up too much forgiveness, then BPS.