I was wondering if the threads where the only diffrence in these 2 carts? The site says they are both e2 with ceramic, and both as listed as 2.5ohm, so im leaning towards the same. Just idly thinking while i wait for my e2 510 order to arrive. I like a more "airy" draw then most, and if the 510s are to hard, but the 808s are the same, i could use my adapter with the variable airflow to get what i like. Or then again maby the 510s will be perfect, is it wrong to be this excited waiting on a carto when you have boxes of the things lieing around already? LOL