HOW you do stitches will always be the same no matter what type or size of needles you are using.
The only difference is to realize that when you knit flat you alternate working on the rs and ws. When you knit in the round you are always knitting on the rs. Therefore, you sometimes have to work the opposite stitch from the ws to get it to look how you want on the rs.
But, with ribbing you always knit the knits and purls the purls, regardless of whether you are knitting flat or in the round.