I recently discover the 306 atty, and it was love at first vape so when I came across some boge 306 cartos, I had to give them a whirl.
*Using a standard 510 carto for comparison.
My Opinion: The 306 cartos are NOT an upgrade from the 510.
Here's what I've noticed:
1. The 306 carto seems to drawn harder, much harder then the 4 day old 510 carto I'm comparing it too.
2. The 306 is a tad smaller around, not much, just a tad; one of the selling points for me in the 306 carto is the fact they contain less filler, and a 510 carto with skimpy filler has always turned out to be a great carto for me. But of course the 306 has less filler, they are smaller around which links to my next point.
3. It does have less filler, but also, with less girth, less juice ... this little guy already needs a re-juicing, and I haven't even finished this review yet.
4. The soft cap hole is extremely small (pictured below) I jammed a 510 soft top on. But with the heavy draw, small hole, and the smaller size around, I feel like I'm sucking on a straw.
Soft Caps --- 306 Left --- 510 Right