Arrachera is usually the better pick for a tender grilled bite, while diezmillo often wins on value and everyday taco use when sliced thin and cooked correctly.
The best choice depends less on hype and more on how you plan to cook it, how many people you are feeding, and what texture you want on the plate.
Rapid read
Arrachera tends to have a looser grain and a softer chew when handled well. Diezmillo has a firmer bite and a deeper chuck-style beef flavor. Neither is automatically better; they just shine in different situations.
Prices vary by market, but diezmillo is often the more budget-friendly choice. That matters when you are feeding a crowd and meat is only one part of a bigger spread with beans, rice, tortillas, and salsa.
For backyard carne asada where tenderness matters, arrachera often gets the nod. For skillet tacos, burrito filling, or chopped beef with onions and peppers, diezmillo usually does the job very well.
FAQ
Arrachera is often preferred for carne asada because it is easier to grill tenderly.
Diezmillo is often cheaper, though prices change by market and whether the meat is marinated.
Yes for many taco or skillet uses, but the texture will not be exactly the same.