I think you should go for lc300 .... electronic seat adjustments is a nice feature but seats once set are hardly moved. Even when its a single driver driven car the driver seat also is once adjusted and not frequently moved.
Secondly leather seats with heat/cold function is good but you ask yourself is it something you are using now? Is it something you cannot live without? There are 2 months of extreme heat when cold seats can be good and 1 month of extreme winters ( in lahore ) when these can be useful.
At the day end lc300 is newer model with new engine.