Similar perhaps in that they both compress the stream. Onavo creates a VPN between your device and their proxy server, but it still uses the traditional TCP/IP stack. Google's solution will hopefully work better. Onavo only worked over cellular data and in my testing it was noticeably slower. The advantage was only in the amount of data. I'm hoping, and from the sound of things, this solution will reduce bandwidth and return data faster than an unproxied connection.