What's the difference between mommy manipulation and mommy strategy?

I wanted Son1 to take a nap after preschool today. As I was leaving Son1's room, I said to Son2 in my arms, "See, baby? See how Son1 is going to take a nap? You are going to go down for a nap, too, just like Son1. And since you are a baby, you have to sleep in a crib. But when you are a big boy, you are going to take a nap in a big boy bed, just like your brother". And we avoided any struggles for Son1 to take his nap. Same thing with medicine. "See, baby? See how Son1 is able to take big boy medicine? (Tylenol Meltaways) When you are a big boy, you will get to take big boy medicine, too. But right now you are a baby, and right now you have to take baby medicine." You get the drill. The same works for making potty trips, brushing teeth, and eating food. I wonder how much longer I can get away with telling something to Son2 in order to get Son1 to do something before the 2 of them get wise to me?