I was just on 14(11/17).
On the trip I was on, the sleepers were oriented in opposite directions. The 30 car, the roomettes were on the aft end next to the diner, and the even roomettes were on the left (ocean side), as were the bedrooms. The 31 car ran with the roomettes forward with the even numbered roomettes and bedrooms were on the right (inland) side.
Same consist, cars oriented differently. There is NO way to predict and no consistency. This is typical of my experiences on the Starlight and on the Superliner trains generally.