Just back from cruising to Alaska on RC, previous 4 on Princess all balconies.
I prefer Princess but would definitely sail on RC again as well. Just some personal taste difference.
Definitely found I had more room on the Princess balcony room.
Also, the dinner service was far superior on Princess. The dining room on RCI was massive and loud and you could barely move around between tables.
The Princess had a much better dinner atmosphere and better presentation of food.
Also did not like RCI tipping policy....you had choice of envelopes OR
prepaid tips...which meant the last night the staff were hovering like vultures for the envelopes....much better to have a set amount that you can increase if you desire.