Taco and fajita seasoning are very similar, and you can use them without anyone noticing. However, there are some differences between the two. u003cbr/u003eu003cbr/u003eFajita seasoning has intense flavors, but it's not as spicy as taco seasoning. It also includes a citrus component that, with homemade seasoning, comes from lime juice after you prepare the fajitas. u003cbr/u003eu003cbr/u003eTaco seasoning typically has bolder, spicier flavors. But, both are very similar in taste, and you can use them interchangeably. You can also adjust the flavors and spice levels of the seasonings based on your preference and what's in your pantry.