Ok, not really "VS" as in I can only use one or the other because I like both. 
I started out with the Joye 510 from Cignot and got off to a rocky start...but thanks to the overwhelming support from this very forum those were soon over come. You guys rock.
I like both for different reasons; the 510 is fantastic for dripping while at home or settled in somewhere. It seems to allow more of the flavor get through and hits a little harder than the 808. But for portability the 808 with cartomizers blows it away. Yea I know there are cartomizers for the 510 and I have some, but they just seem smoother when used with the 808.
So on the road = 808 and a few Cartos.
At home = 510 and some juice
Love em both and do not regret buying either one of them.

I started out with the Joye 510 from Cignot and got off to a rocky start...but thanks to the overwhelming support from this very forum those were soon over come. You guys rock.

I like both for different reasons; the 510 is fantastic for dripping while at home or settled in somewhere. It seems to allow more of the flavor get through and hits a little harder than the 808. But for portability the 808 with cartomizers blows it away. Yea I know there are cartomizers for the 510 and I have some, but they just seem smoother when used with the 808.
So on the road = 808 and a few Cartos.
At home = 510 and some juice
Love em both and do not regret buying either one of them.