Short answer... Yes, however, I don't notice a huge amount of difference going from my V70 with 15" wheels (can't remember tyre size, but pretty big sidewalls) to my 159 with 19" wheels and obscure tyre size, not as low profile as yours, but still.
I travel a mixture of town driving, fast a road and bumpy country lanes on my commute, and the roads are a mix of well maintained and potholed to hell.
Are you running runflats on the beemer? Never had any sustained experience of them, but drove a Cooper S some time back and it was pretty uncomfortable, have heard others state the same.
My boss has a recent TT and he's also complained about his tyres, its running on 20" rims and they're like rubber bands.
Posting from my phone - excuse spelling mistakes