I would suggest you look at and feel the Legacy and Kona fabric to see if there's a difference and it's what you want. Me, I like a heavy cotton which almost feels like flannel. If order on line, it's got to be a brand I have in the past been pleased with- Kona Cotton and Moda both fit that. If it's not a brand line or one which has been hit or miss for me, it has to pass the feel touch weight test in a store.
I will say I purchased some Legacy a while back for a quilt for my then young son. It didn't make through the first year, but he used that blanket a lot. It was loved to pieces.