Here are the main differences:
1) Everyone views your site at the same time - you use credits to bid for a particular time of day and when that time arrives, if you have bid enough credits, everyone who is logged on to Sweeva at that time can view your site and nobody elses.
2) Get Live Feedback on your Website - People can vote Yes, No or Unsure when they view your website and they can leave comments. A lot of people seem to leave completely useless comments, but the Yes and No voting will give you an idea of how well your page is received.
3) Unique Features - you can accumulate points and credits and unlock features by particpating. Participating means viewing other peoples' pages, leaving comments, tweeting, promoting your splash page, referring other people, using the toolbar and more. The benefit in this is that everyone has to participate to get value, which means more people to view your pages.
I've only been using Sweeva for a few days, so it is too early to write a full review, but it seems more responsive than most traffic exchanges and it's also fun to unlock features and climb the different levels :-) You can also watch people commenting on and rating your site live!
Sweeva, like other traffic exchange style sites works best when you advertise a short splash page or lead capture page rather than a long sales page or your home page.
Upgrading in Sweeva will give you credits every month, double credits for viewing sites and various other benefits, but you can also join Sweeva for Free.
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