Winace,
I respectfully disagree with you. I started with a kr-808 and was able to quit analogs altogether. I get TONS of vapor on mine. It is definitely better with the newer batts, both auto and manual. Since you have never tried one, I don't think it is fair to say to steer clear if you want more vapor.
I also have a 510, which I use to drip, (got tired of messing with polyfill) and unless the atomizer is like new, my vapor production falls of dramatically. That doesn't happen with the kr-808 until it needs refilled.
Bottom line, though, whatever works for you. Being off of analogs is what is most important!!
Glad you disagree, this is what creates discussion. There are many other outlying variables, but apples to apples.... same drag length, same voltage, same time to RMS voltage, same juice, same relative humidity, same atomizer, same cart... you will produce less vapor with more delivery of nicotine on a 100% saturated medium to the coil as compared to a 50% saturated medium to the coil. No opinion involved, whether it be a 510, 901, 801, KR, etc..., it is just how it works ;-)