Skype or Google Video, which one should I use?
If you want a no-frills and no-nonsense app use Google video. You can use it from GMail without the need for another window (other than the browser itself).
If you, however, want a feature-packed standalone app that can do much more than just call numbers and video chat, go the Skype way.
Personally, I would recommend you to have both, as they serve different purposes in different situations. If you live in the US or Canada, go Google. Otherwise, choose Skype.
This depends if its for professional or personal uses.
wiith Goodle Video you can have easy access to Google Contact list + domestic calls and this can be sufficient for some to choose Google Video. Also with voice some can make free calls to land lines.
You can also use iGoogle and Orkut to make or receive calls. Calls made inside the US and Canada are free. International calls require payment.
Calls are free between Skype users from anywhere in the world, as well as video and IM. Use a Pay As You Go or a subscription to call landline or cell phones. You can even send SMS messages.
If you are busy working on a project and do not have time to answer calls, you can use the call forwarding to transfer the call to your voicemail. You can also use the Caller ID to screen video or regular calls that you do not want to answer. You have to pay to use Skype per minute if making a call to a cellphone or telephone. With Google Voice possible calling via my gmail account for free.
Skype has a lot of options that allow users to communicate with people without a computer or mobile device, making it particularly suitable for users with those types of contacts.
For a comparative table