Both are very nice... So it's a hard choice to pick one over the other.
For me personally, I like the Stainless steel material and the slightly smaller size. The trade off, is that the CR2 battery is a little less capacity. But it's not that much difference really...
The heatsink on the Chrome Pocket Mini is a hair larger in diameter, but the CR2 heatsink is just fine. So that's not a big difference either. Both are available with a copper heatsink option.
One thing you may want to consider, is that I have a couple of the SS CR2's on hand. And my new order of Chrome Pocket Mini hosts is on order from DX. So if you want one of those, you will just need to wait a week or two...
Send me a private message!