[drmadison]

O2 wins on noise, heat, power consumption, and ease-of-introduction (VGA for video for example). I have both and am currently working on upgrading my O2 to start using it regularly over my Octane2 due to the heat piece - it gets so toasty in my office. The O2 is also far "cuter" if that matters at all haha.

That said, I'm crazy and insist on my SGI as a daily driver so-to-speak rather than a trip-down-retrocomputing-memory-lane. If you just want a cool machine that's "different" from what's out there on the PC side, the Octane fits that much better. It'll take more ram, be more powerful, supports better graphics, etc. etc. etc. And it does a wonderful job as doubling as a medicine ball for working out / dead-lifting.