Here is a quick look at the Blackberry Z10 against the Lumia 920.
A couple of hours ago, RIM CEO launched the new OS BB10, it is meant to bring Blackberry and their mobile division back to life. I think it's just a sequel to where the Nokia N9 left off.
But I'm not going to rant about anything, they did do a good job, they took their time in developing this new OS (unlike Microsoft who brought out a half baked OS in WP7).
As far as how well the BB10 will do in the market, it's going to be tough!
Anyway, enjoy the video comparing both new OSes BB10 and WP8