This is kinda subjective. I noticed after my drop, that it was harsher. I'm also noticing more intently because I'm running 19's and trying not to bend my rims. Other people that have not ridden in a BMW comment about how smooth it is. I've been riding that way for a few years.
OT/ I was looking for a black 325 manual, so I wasn't aware of what the Xi meant. /OT