OK I'm getting conflicting info here.
I just asked someone I knew who did a nutrition degree and is getting her nutritionist license. She told me that the answer is no. She says calorie is calorie, the body doesn't distinguish where the calories come from. It doesn't matter in what order the food is eaten, the body will automatically respond with the appropriate enzyme and digest it.
Plus there is almost no way to completely separate fat and carbs. In most carbs like rice, pasta, noodle there is fat because they are cooked with oil. And even with meat there are often carbs on them.
She says all the low carbs or low fat diet plans are false advertisement because as long as you burn more calories than you take, you will lose weight, it doesn't matter where you get your calories from, carbs, meat, vege, fruit, etc.
So in conclusion she told me eating carbs and fat together will NOT increase the calories or fat intake from the meal.
So I guess I can start eating rice and steak again, or meat on a bun.
Unless someone can tell me she's wrong and explain it with scientific facts.