The Canadian version is the only edition you can find new. If you can find the out-of-print US version, you've got your hands on another Who out-of-print CD.
To find out which is Canadian and which is American, you can:
A) Look at the release number. The American version is MCAD-31221, The canadian is MCBBD-31221
B) Look at the back. It says the place where it was manufactured and the location of the MCA company.
To a new Who fan, both of them are the same in sound and covers. To a real collecctor, getting the US version would be more of something to get.
But either new Who fan or Collector, JUST GET THIS ALBUM!!!!!
Regarding the fan's request a few review below. I recently purchased "Two's Missing" (also fantastic)on ebay Germany for € 35,-. I was really lucky, I know. It is also sold on amazon market place Germany for € 199,- (!). So I agree: Do buy "Who's Missing" now as long as it can be purchased so easily.
To sum it up. I love that band!
Shout & Shimmy -The UK B-Side to My Generation
Leaving Here -Recorded when The Who were The High Numbers
Anytime You Want Me -The slow song for this CD and the B-Side to
'Anyway, Anyhow, Anywhere'
Lubie (Come Back Home)-A great rarity. Previously Unreleased
Barbara Ann -A great rocker, featured on "Ready Steady Who" and
the remastered "A Quick One"
I'm A Boy -The version most people know. Great Tune.
Mary-Anne With The Shaky Hands -B-Side to the classic 'I Can See
Heaven & Hell -A GREAT John Entwhistle song. B-Side to
Here For More -1 of the very few songs written by Roger. B-Side
I Don't Even Know Myself -B-Side to the classic 'Won't Get
Fooled Again. Featured on the remastered 'Who's Next'
When I Was A Boy -B-Side to 'Let's See Action'
Bargain -Previously Unreleased (Why? This is EXCELLENT)
I also reccomend 'Two's Missing'