Formula

Anyone go from breastmilk to formula and see a big difference I their child’s behavior? Like did they sleep better? Seem full after feedings? I’m exclusively pumping and it’s SO hard to do and try and take care of a 6 week old. I make just enough for her so luckily I have one bottle made for her in advance. I’m getting discouraged with pumping. Especially waking up in the middle of the night to pump. I need my sleep!!!!