La Vencedora is the best brand. Mexican vanilla is water-based, rather than alcohol-based, so it doesn't cook out like American vanilla does. I've used it for 40 years and wouldn't use anything else. It doesn't taste different, unless you mean better. :)
Also, I keep a tall, skinny glass container with sugar with a couple of vanilla beans in it. That way I always have vanilla sugar handy. The vanilla beans last a long time, so you can just replace the sugar as needed.