This is a very potent sport of Greek oregano. It has furry foliage, is generally grayer in color, and is really really hot. If you don't have Mexican Oregano (Lippia graveolens) available for your Mexican salsa, then this would be my next choice.
'Hot and Spicy' gets larger than Greek oregano, growing to 3 feet tall. It prefers full sun and good drainage. It is herbaceous in all except the mildest winters.