Design:
Mini is way cooler, don't we all agree? Same dimensions, Mini is 1.3 kg, while dis one is 1.5 kg.
Processor:
Mini has a Core porcessor, while this one has 1.7 GHz Pentium M. Mini is superior.
RAM:
Mini supports up to 4 GB dual channel. this one supports up to 2 GB single channel. Mini supports 667 MHz, while this one supports 400/533 MHz RAM.
HDD:
Both 2.5", Mini has SATA, while this has IDE. Mini is better.
Graphics:
Mini has a GMA/950 while this one has a GMA/900.
Drive:
Both slotloading DL drives. No clue about the speed of this one, but Mini has 8x.
Connectors:
While the Mini has 4xUSB, 1xFW400, audio I/O (5.1), DVI and Gbit ethernet, this has 2xUSB, 1xFW400, audio I/O (5.1), DVI, S-video and Gbit ethernet. Mini is clearly superior. Both comes with DVI to VGA adapters.
OS:
*cough cough*
Mini is better and cheaper.