It varies depending on what you're doing. Even then however - you'll barely notice the difference unless you benchmarked. Like stated above, the only 'major' difference is HT, which is only of use in 'multi-core' applications (e.g. you'd notice better vm performance, faster rendering?, etc)
To save my breath - just get the 3570K and the D14. It's simply not worth the extra cash to get the 3770K over the 3570K.