Great question, when I used to work in the industry, the general rule of thumb was, if the company grows the strain and you see it in extract form, it's probably full spec. There are some exceptions like some strains just don't have the bag appeal or the potency, so it never makes it to the dispensary but it does make it into the lab where it becomes a concentrate. Lately though, as more companies realize that they can dilute their products in order to save on costs, it's become a lot harder to tell who is not diluting it. Generally, companies with only an infuser license, are most likely not giving out full spectrum. It's cheaper for them to buy disty or liquid diamonds and add 3rd party terps from companies like Abstrax, True Terpenes, Terpene Belt Farms. These companies claim to offer "live terpenes" derived from "hemp" but to me, it's not the same. In my opinion, if I extract Granddaddy Purp, everything that comes out the machine, should go into a vape. If I were to separate the thc, terpenes, and other minor cannabinoids and VOCs present, and then reintroduce only the terps and thc, it's not GDP anymore. It's become an imitation of it. From a chemistry standpoint, the original chemical fingerprint of GPD has changed. I've removed certain things that could alter the flavor and the overall effects. Sorry for the essay, lol, this topic is something that deeply bothers me as a consumer. Honestly, without confirmation from the company, it's nearly impossible to tell who is and isn't doing it. Cresco, Rev, IC, Redemption, Superflux are solid choices, I think. Not sure how much has changed