With metal grands, I run AW 1600 and 2200 button tops. Typical build is .4-.5ohms and I get about half a bottle vaped on a fresh charge, with not much difference between the two types. I typically change out at around 3.7V.
In the woodies, I run Samsung 25R's and they do last longer.
I'm thinking I'd run these new AW flats in a woody in a heart beat - just not sure of the charge down curve (i.e., I don't know, not that I'm skeptical). If these are genuine AW's, and you'd have to assume they are from this vendor, they'll be of high quality.
I personally don't run flat tops in my metal grands as I don't like the button throw as much and I have had more propensity for arcing damage (user error, most likely, but hey, I have options so I take them).