My very first quilt was a Log Cabin Quilt in a Day for my son when he got his "big bed" in 1986. It was in navy's and white's and since there was no one to guide me, I used batting and a navy cotton flannel backing - and because I didn't know what else to do I tied it.
It was washed over and over (never experienced any stretching) and lived a hard life in a little boys room. He used it a a bed cover/blanket. It recently moved with him to his new apartment. He still loves it and now that it is on it's last legs I expect soon I will do a new quilt for him.
So - use both!