Both are good tools, but not without risk, the tools can deliver what you need as long as you can stay under the twitter radar. But the quality of the followers and the conversions is a different matter.

twitter traffic is going to be lower...not sure why but it just always has. but who cares about conversions when it comes to twitter...I think it has to do with exposure and branding more than anything else

Through my short 6 motnhs of using twitter I have found it to be one of the biggest traffic sources to my site. Period! I have a average following of 1800 followers and most times I post 1 link which gets around 60 clicks which is good in my eyes! The amou t varies depending on what time of day etc, thats where the testing comes in.

I don't use Twitter much but I don't think both tools are good choice

Listorious site helps you expand your Twitter fiefdom by finding users who are grouped in lists or have certain keywords associated with them.

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Afcourse traffic comes from both tools are best