I mean, to a point. It's all agave, the only real differences come from the climate of the agave plantation, the roasting style of the agave, and the barrels.

The major thing is that distilleries tend to use the same plantation, roast, and barrels for every brand. They might sort the leaves by grade or barrels by age and type, but the differences are so minute when it comes to a Reposado vs a Reposado that it may as well be the same if it's from the same tequilera.

Story time:

I used to work at a local small liquor store. Maybe 750ft². The owner ordered a custom 1/2 barrel of Dobel Anejo, one he and his daughter chose based on taste down in Mexico, and the delivery was running late.

He got it eventually, but there was a major issue. We had no bottle #1, but we had bottles 140 thru 152.

Issue? It's a half barrel with only 128 bottles. I started pulling a few out of the box and noticed a color difference between bottles. It was a mixed barrel and they likely sold his barrel already.

Let's just say Dobel had to come pick up the entire delivery, and any time a liquor rep comes in with Dobel, the pitch is stopped and it's just the casual business conversation or on to another brand they're out to sell that day. He carries cheap Dobel only now, nothing high dollar after that.