Cbd is unregulated for the most part so flower, tincture, vapes etc all can be trash, when you find something good stick to it.
Most will be small scale craft growers that actually give a fuck about the products they make.
Cbd isolate is used in most vapes, and while it does indeed work, cbd isolate in a tincture is almost useless. Full spectrum is far better, add a lil extra thc, CBC, cbg and cbn and tour golden.
For balms, it also varies wildly because its rarely just CBD balm. It's got turmeric, bromalain and or other anti inflammatories in them.
There is also about 100 daufferwnt ways to make each product too so results will fluctuate as well based on methods.
Just some shit to keep in mind