So you're comparing two debatably over-priced items (when new), but to try and validate your point about price
It's really not very complicated at all mikeymike, the only relevant comparison for anyone thinking of buying a NG system *today*, are what options are available *today* (not a decade ago, not a decade into the future when/if OS4 finally supports the HW fully)! I'm talking about hardware availability, hardware price, hardware performance, hardware quality, what features the OS has, what Amiga Standards (like MUI, Poseidon, CGX, etc) the OS has, the performance of the OS, the level of Amiga compatibility in the OS, the stability of the OS, etc. Learning things like this, might help you make a well educated purchase decision, *not* having access to this kind of info may lead to people being fooled to buy a $3,000+ system while being of the wrong impression that it would be the only or the best alternative. Knowledge is good!
you're comparing a second-hand approx. ten year old Mac with a brand-new X1000.
The motherboard design may be new, but the core PA6T was created in 2005 to be ready for laptops in 2007, but got shelved after Apple went x86 and bought PA Semi for the competence and pulled the plug on the PPC things, so it's at least half a decade old technology, aimed for mobile/power saving applications, and all this clearly shows in benchmarks.