seed stitch vs stockinette stitch

I’m knitting a scarf and the pattern calls for stockinette stitch and further down the pattern is the seed stitch. It looks like they both call to alternate k1, p1 and p1 k1. What is the difference and am I missing something?
Thanks
Sharon

Stocking/stockinette stitch is alternating rows of knit and purl (one row knit, next row purl and so on), seed stitch you alternate between knit and purl stitches across a row, then knit the purls/purl the knits on subsequent rows. If you knit the knits and purl the purls on subsequent rows, you get ribbing!

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Thanks for the clarification!