You guys have got to be kidding.. better in what way?
S4 is a great car... and very fast ...but ...it's nothing like the Lexus Coupe.
Also you are comparing the S4 to a convertible.
I used to be a Lexus technician ....years ago
Toyota hands down will last longer with LESS maintanance.
Now.. the german car handling..that's a different story..but if you want your car in the shop for little problems once a month... then get the S4