You could compare two different batches of cannabis with one having 10% more THC in it, but it might feel weaker than the lower THC batch if the latter has more terpenes in it than the former.
Too many people will assume that one batch of beer is better than another just because the alcohol content is higher in one versus the other. It’s not just flavor that sets apart two different kinds of alcohol. There are other compounds found within beer and wine that can affect the subjective experience of the person consuming them. Those compounds are referred to as terpenes, and they’re also found in fruits, vegetables, flowers, grain, and other natural sources. Terpenes not only provide flavor, but also subjective psychoactive effects. The terpenes have a synergistic effect with alcohol in the beer and wine, making each more potent with particular blends with unique terpene profiles. Oddly enough, cannabis is the same way. You can’t get a full “entourage effect” out of just cannabinoids like THC and CBD, you also need the terpenes present that come from the original plant in the first place. That’s why the terpene content is often more representative of a cannabis product’s effects and potency than merely the THC content. You could compare two different batches of cannabis with one having 10% more THC in it, but it might feel weaker than the lower THC batch if the latter has more terpenes in it than the former. When I’m buying cannabis flower products or cannabis concentrates, I always ask for the terpene content before making my final decision. That’s how I end up having the best luck with the various cannabis products that I source from local marijuana dispensaries. Cannabis flower products with over 3% terpenes in them are particularly potent compared to 1% batches.