I have used both, currently have the B-stones. They are cheaper and better than the michelins in everyway excepting some road noise.

Mike

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E