See Rick, you're learning. Particle size an absorption rate has a lot to do with what you end up tasting. Before my wife bought me my little coffee grinder for my birthday, I was using flakes. I'd dry the peppers in the dehydrator until they are crispy and lay the peppers, which are already cut in half, on a plate. I'd run a spoon back and forth on top of them until they were ground down as well as that will do it. They were smaller than the flakes but larger than the powder I'm making with the fine grind. You got SOME taste, but you were really swallowing most of the heat, which is a waste. Once I made powder, it hits you at once. Just think about how it tasted when you try a few grains on your finger. When you mix it in mayonnaise, you are swallowing more than you are tasting. Put it on top of your bread, the powder is hitting a part of your mouth. If you use the powder when you cook something like chilli and it simmers with the powder in it, the chilli will be a whole lot hotter tasting than if you just sprinkle it in the chilli after the fact. Just let that chilli sit for an extra day or two, and it will be hotter than when you cook and eat it right afterwards. We think the fine grind has a small particle size. You have found, and probably knew already, that alcohol is a good organic solvent. Just think how much hotter the powder got when you put it in your vodka. Now those particles are dissolved down to a small fraction of the size as the powder. Hea, you could probably mix a bunch of powder in a small amount of drinking alcohol of your choice to use as a drip into making food!
Fresh peppers have the liquid capsaicin oil in them and that oil spreads easily. You use that in chilli, and there will be an obvious increase in the burning. The powder is easy to use, but it varies on how much you taste it depending on the form you use.
Alright, mad scientist Rick, when I cut open a fresh super hot pepper and lay down each half, you can see a little puddle of liquid. I've seen Douglahs that looked like I had washed it off after I cut it in two with the water collecting in the halves. What if someone were to cut up a bunch of hot peppers and collect all the liquid in some sort of mini eye dropper? Hot hot do you think that stuff would be? I don't know if it would taste like the pepper itself, or have hardly any taste at all. Just think about having a vial of that laying around to use with food? I've eaten slices of fresh super hot peppers, so I shouldn't worry about the heat, but I just haven't had the nerve to stick my tongue down in the puddle to see. It just sounds like a stupid thing to do, like sticking it in a light socket or something.