There is detailed information about the features of different Windows 7 versions. http://en.wikipedia.org/wiki/Windows_7_editions#Comparison_chart
But what about the performance? Is there any site that benchmarks different Windows 7 versions on same machnines and compare its performance, ram usage etc ?? Thank you
Note: I have a machine having "Intel Atom Dual Core N550 1.5GHZ, 2GB RAM"