Where can I find a comparison chart between these crypto 2.0 currencies like NXT and ethereum? What are some of the major advantages of each of these coins in relation to one another?
It currently has pretty comprehensive comparison between Ripple, Ethereum, Mastercoin, NXT, Counterparty and BitShares, with information on other platforms also available although in smaller quantity.
Here's a really good source on the difference between etherium and NXT  and here's more between mastercoin and etherium 
Hope this helps!
here you go :) it is not finished yet......
There is now this site comparing bitcoin 2.0 techno (all the ones using the bitcoin blockchain): bitcoin2comparator.org.