I am not going to be much help, sorry.
We have eaten at both many times. Mostly breakfasts, but plenty of lunches and dinners also. Both are great places with great food. THe turn of the century atmosphere at CP really steps you back in time. The elegence of all that crystal and the food choices are great.
1900 has equally good food and is also pretty inside. One of it's draws is simply visiting the GF. We like to walk around there and explore the resort.