Since I have recently covered and used for a little while Vator.tv, I have to conclude that from a social networking point of view, YouNoodle is better, I like the ease with which you can go from following company, contact and network and also join groups. Vator has somewhat stricter distinctions between startups, service providers and contributors on their site. I do like Vator's company information better though plus the push they have that you should provide a video pitch and/or demo. I guess time will tell which one that will grab the major share of users. One thing to consider is also, what's the key benefit each site is going for? What I am actually looking for is, do you provide a service just to facilitate and hoook up people and then leave it up to them to figure out what to do, or do you intend to enable and encourage an efficient exchange of needed services between all parties involved?
So far, most social networking sites fail to do the latter. The big danger in easy to use for everybody netwoking sites is the same all the time. You get way too many people that are somehow going to find the few that will make sense to communicate and do business with.
YouNoodle does have an interesting approach in trying to provide analytical tools to help your startup business. See the startup predictive tool, http://younoodle.com/predictor that will help you analyze what will your startup be worth in three years.See home page of YouNoodle below and feel free to explore my page, http://younoodle.com/people/thomas_lidforss
Also, contact Thomas Lidforss International for your startup business services needs.