My first thought is that it won't make any difference, and I still don't think it will. However, it occurred to me that with the wider strips, you could maintain the proportions by adding 25% to the length of the strips. That way, you would either have a 25% larger quilt or use fewer braids.
You could also use a 1/2" seam allowance on the sides if you have a specific pattern and size you want to make.
bkay