How about a comparison we can relate to?
Lots and lots of comparison charts all over the web on the new WP8 phones, some include other platforms, some don't.
The problem with most of them is they only do the latest phones, which most of us have yet to actually touch.
I got to thinking about all of the chatter over the 920 vs. the 8X, that it needs a frame of reference. So here is a quickie chart that includes the Lumia 900. Now you have a frame of reference for how the new devices will feel in hand against something you probably already know. Of course there is no substitution for an actual hands on, but for most of us, that isn't going to be for at least another month.