powder vs ready pour

Hi all...we've had our LO on enfamil ready to pour formula since birth (5 weeks old). The last couple of days we've noticed that she seems to be getting an upset belly and she's been spitting up a bit. We had gotten a sample box from enfamil and has a can of the powder gentle ease. We switched to that and I've definitely noticed a difference in her fussiness today, and she doesn't seem as gassy and less spit up. My question for anyone who might know is this...should I be expecting a little regression in the amount of time she'll sleep since the powder is thin her, therefor will not have her feeling as full? We can get the ready pour in the gentle ease but I'm finding the powder more convenient, I'm just not sure what to expect come bedtime. Thanks in advance. (Picture of her in her elephant boppy, just for smiles)