Not really, it's personal preference. We chose bus up as it was a later start time (had to meet our driver off the ship by 8:15AM), and we thought the skies would be clearer in the afternoon if the morning was foggy so that we'd have a better view from the train (for us it was 'less foggy' in the afternoon...not completely clear). We also ended up enjoying the fact that the train ride down was relaxing after a day of walking around/