I chose the IS 350 over the BMW 330 because after test driving both of them I could not discern a significant difference between the two. To me that was a big plus for the Lexus. Acceleration, handling and braking was very impressive. And for the interior, there is no comparison the Lexus wins. Plus the features and oh that Mark Levinson, need I say more. People complain about VDIM but how many people drive to its limit? and how often? BMW has more to lose and Lexus more to gain. For an awesome daily fun to drive performance vehicle it was a no brainer. Now add better reliability and good looks and ah yes price need I say more.
Acceleration. Handling, braking, interior and features.