Diffrence btwn a garter stich and a stockingknit stitch

I’mmaking a mitten and having trouble understanding btwn the garter stitch and a stockingknit stitch?

They both require knit one purl one

No, it depends on if you knit flat or in the round. Knitting flat, a garter stitch is knit every row and stockinette is knit one row, purl one row. In the round because you only work on the front side of the piece, they’re reversed; garter stitch is knit a round, purl a round, and stockinette is knit every round.

See my examples of what they should look like in my reply to your other post. These are small projects so they were knit flat, but it doesn’t matter. It’s how they look that determines which is garter and which is stockinette, not how they were made.