Did you know that Google Analytics shows you sampling vs actual numbers? Directionally accurate, very useful, etc, but not 100% accurate, and sometimes not even close. Oh and it is all delayed data.

IO Tech is real time and just shows what actually happens. What pages get X# of views, how long people stay, etc. The normal stuff...but it shows the actual data in real time.

And all of that is just the IO Tech vs GA part. IO Tech also has tons of other useful data and features to help you optimize your site for more traffic and more $$$$$.

The limits are awesome, they opened up the API, this is a complete no brainer.