No they don't all work alike... there are many differences in them depending on whose dialer you are using.... some are 120k downloads and some are as low as 52k downloads and depending on what dialer you are using, they connect to different sites.
Right now, that I know of, there are 6 different dialer companies. Each one of these dialer companies have a ton of resellers...... so you have that choice to make.
Then you have payouts! Some payout every 2 weeks, some every 30 days, and some 45 days after the paypriod........
What I personally suggest you do is do some research, find out who is the most reliable with the best webmaster support FIRST. You don't want to get stuck using a dialer from someone who is only out for the money and that is all.. you want someone you can reach at almost a moments notice. THEN you want to look at who has the payout schedule you are most interested in... if you want to get paid every 2 weeks, then check out all the ones that payout every two weeks and pick out the best.......
Content, this is a major issue....... find one with the content that best suits the traffic you have. You can get a high payout on a dialer but if you get no minutes then what's the point in that? Ask them the questions you want answered, most all of them will answer your questions, and if they don't...... then you will know that is not someone you want to deal with.
I hope I have helped you and not confused you even more. Some may not like my methods, but I always find out what I want to know about a sponsor before I use them.... dialer or no dialer, if they hold my money in their hands, I want to know I am going to get it without a fight.
Tam
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WebmasterCommerce!! /
May the Force Be With YOU!!