As a semi-aside, if you're bound to ask about power consumption, development boards are probably a good route not to take. Just by going barebones Atmel chip, you'll be saving a lot of power while only giving up a few niceties.
There's a pretty in-depth look at power saving on the latter (starting from an UNO) at this link I've had bookmarked (and mirrored locally) for a long time now:
http://www.gammon.com.au/forum/?id=11497
SparkFun also has a pretty good read:
https://www.sparkfun.com/tutorials/309
Can't help Mee_n_Mac out with the pure Uno (or red board) power states - would think it's easy to google, but there's dozens of results, and none of them so far a simple table matrix of enabled features / states vs current draw.