you can't go for what processor is more powerfull they are not even closely related so they can't be compared. the mac is a whole package, everything for the mac is designed to be there.. the os the processor, etc. The dell is all parts from all over the place with an operating system that is made to work on any kind of computer, so I am obvioulsy playing up the mac part of the argument, but there is also the argument that the dell is cheaper and that it is windows. Windows is more the standard although mac computers work with them well.. so its up to you, what do your really want, don't base this on power of the computer itself.