They are first cousins, having a lot of similarity. They have the same thumb gusset, the same 3 x 1 rib set up and coin lace. There are tiny differences which make for slightly different looks, but they are equally difficult/easy.
This one is called Coin Lace Half-Mitt. The coin lace pattern happens every seventh round which makes it look at bit like a cable pattern. It also has a slightly different treatment at the cuff when you get started. Here's the link: Coin Lace Half-Mitt
This one is called Sitka Spruce Half Mitts - named after the colourway by Sweet Georgia Yarns. The coin lace pattern for this one happens every fifth round making the coin lace look rounder, more like a coin. This pattern also comes with a chart, so if you are new to knitting half-mitts with a pattern and thumb gusset, the chart with help you find your way. Here's the link for this one Sitka Spruce Half Mitts.
They are so easy to make and only take a 50g skein of fingering or DK yarn. You can easily make several in a week. Thanks to Tina for the test knitting and for all these lovely samples.
I have another pattern under development. So let me know what you think of these and the way I explain things. Happy knitting!