Fair question.

In terms of big differences, I'd say that my app offers more ways to get feedback.

You create one survey and then get multiple choices on how to use it:

1) web-based (this is like google docs)

2) mobile (optimised for iphones)

3) website popup - check out http://goodgecko.com/tour/genie for an example

and planning to follow it up with...

4) telephone surveys - created automatically and complete with robotic synthesised voice!

5) ???

That's the philosophy. Create a survey, automatically get a bunch of different ways to use it.

Thanks for the question though! Makes me think I should explain this better on the site.