They are very close in benchmarks. https://i.imgur.com/Bk5Dcfb.jpeg

I think we will continue to see some performance improvements for both systems over the next coming months.

It works great if you turn the BC-250 on, play games, and turn it off.

By jank, I mean it's not a streamlined console experience like the Steam Machine. There's no suspend/resume and the idle power is quite high. If you want wifi/bluetooth, you'll have to pick a chipset well supported by Linux. (I use ethernet and a steam controller). If you want USB ports and a power button in the front like a console would have, you'll have to pick a solution for those. Carefully read over the options for power and cooling. They're very important if you're going for max performance. All the little extras add to the over-all cost as well.

https://mosfet.party/ sells a bunch of BC-250 add-ons to give you an idea of price and options.