The most significant difference between our recipe and Trader Joe's dressing is the base: our recipe starts with Greek yogurt, while Trader Joe's has a mayonnaise base. From there out, the two taste pretty close (aside from the obvious fresh vs. bottle flavor, of course). Our recipe results in a slightly creamier dressing, with just the right amount of lime to brighten whatever you use it on. The one change we consciously made was to leave out the the cotija cheese. We like to add cheese as needed, and adding it directly to the dressing didn't seem to do a lot to improve either the overall texture or flavor.