Can someone explain to me the difference between:

Huggies Overnights (Effectively a diaper)

Huggies Goodnights (More like undies or a pull up I guess? The label says 40% more absorbency. I can't seem to figure out if this is referring to just other brand similar products or to the diaper or what?)

Huggies PullUps Night time (Are these like normal pull ups but slightly more absorbant?)

My DD is getting a little big for the size 6 overnight diapers. The shape of her hips/size of her booty....something - they just don't seem like they are going to fit much longer. I don't want to move to a less absorbent product and am basically just trying to figure out if either of these other products are the right move.