9 times out of 10 newer tech is faster and it dont take a heap of tests to realize a 2 core processor will do better than a p4.
Clock speed dont really mean a great deal when ur judging 2 tolly diff processors.
Pick the atom
I would suggest the atom. Although they both have the same features, such as hyperthreading. The atom is newer technology and from your specs, has more resources with it.
Atom 330 1.6Ghz ,2GB Ram
Pentium 4 2.8Ghz ,1GB Ram
They're same price which is better ? :confused4