Which is the better Processor?

Viiv Intel Core duo processor E6400 (2.2 ghz)
Hyper-threaded 2.8 GHz Pentium D 920 dual-core processor, 4 MB total L2 cache, 800 MHz front-side bus (2.8 ghz)
Hyper-threaded 2.8 GHz Pentium D 920 dual-core processor, 4 MB total L2 cache, 800 MHz front-side bus (2.8 ghz)