A difference between the two is no concern. They're individuals, so the important thing is what's normal, healthy weight for each of them. Not a bad idea to keep a log to refer to later if things change.
Now, these are your Ekkies, correct? My concern here is the diet. Not sure what pellets you're using, but most are "enriched" with extra vitamins and such, and generally not great for Ekkies with their digestive system. Personally, I don't have a problem a few once in a while, but definitely not for the bulk of their diet. Everything in moderation, right? Some folks are more strict about that than I am, and insist on no pellets at all for them. Grains, veggies, and a little fruit should be the predominant items.
My guy Tucker came from a home where most of his diet was Zupreem natural, because it has a picture of an Ekkie on it. He loved it, but it's kind of like birdie junk food. Between that, and being clipped so he flew as well as a large rock, he was a little chunky/flabby. He's become an excellent flier now, and quite muscular.
Transition was not too bad for him, but he still isn't a fan of some of the green stuff. He's getting there. I've long since used up the last of the Zupreem he came with, and haven't replaced it. I do offer a few Tops pellets with his dry food daily. No added stuff in them, but I don't think they're as appealing for him. Sometimes he'll eat them, other times they get tossed. Birds...