The differences we've noticed are, where you walk and drive and also where the steering wheel sits.
We headed off at 11:55am and arrived in Los Angeles at 7:00 the same morning. We arrived at our B&B without the breakfast and proceeded to walk the Hollywood walk of fame. We also saw the Hollywood sign and climbed the piano stairs. We visited the rock hall of fame with hand imprints and the Chinese theatre before walking up and down the boulevards. We also wandered around the farmers markets and the grove. The grove was decorated for Christmas and at 7pm make believe foam snow was blown from the roof tops - it looked just like a pretty snow fall.