It's different in that you don't ever knit on the WS in the round, only the RS. The back of a knit is a purl, and when you end Row 1 with a knit and turn it, you're looking at a purl st, so repeating the first row works. You don't turn in the round, so when you finish round 1, you're looking at the k1 on the next round, and you have to start with p1. As long as you knit the purl sts and purl the knit sts whichever way you knit, you'll get seed st.
sue- knitting heretic