yes, pretty much the same. a couple differences...use a little bigger seam (i use a 1/2" seam allowance when working with flannel) it tends to fray a little more because it has a looser-weave. you may have to adjust pattern measurements.
and if it is (thin/flimsy) a spray of starch or sizing will make it easier to cut straight.
flannel washes up wonderfully soft and fluffy!

When I buy flannel I always buy extra fabric for shrinkage. I wash the fabric twice. If the fabric seems to me a loose weave I will wash it again.

I have a book of flannel quilts and the author specifically says not to wash the fabric. Lots of opinions on the subject.

Question about using flannel as backing? Can you use only the top and flannel or do you need something like muslin in between?

You don't prewash if your going to make a rag quilt do you?

To back the quilt I use two layers of flannel and it makes it a nice warm quilt.

clean your machine often--it makes lots of lint

I use flannel to back quilts,sometimes with a batting sometimes not. If i want a lightweight quilt I will use only the flannel, esp. nice for a baby quilt.

I agree with jodimarie. Washing, drying and using sizing help to make flannel much more manageable. And well worth the effort! Flannel backings add a nice touch to a snuggly quilt! :)

I made a flannel log cabin quilt for my son without pre-washing the fabric. The fabric had more body and was easy to handle. It has been washed many, many times by my son and still looks great.