Some products have the option of different colours or styles, and some Etsy sellers only list the product once with the option in the description for the alternative colour or style, remember on Etsy good images are the main selling point, so if you can show this product in the alternative style or colour you chances of getting another sale will increase, but lets not stop there, some buyers are lazy and wont scroll all through your images to see the different options, listing these products with the alternative options separately will also increase your sales, and further exposure from the keywords, for example some people search for "Gifts for her in pink"