I find it very odd that they depict the iPhone on top of the N1. To me, that conveys a position of higher status for Google's competitor and that doesn't make much sense.
There are many, many more iPhones and iPod Touches out there than there are Nexus Ones. Google wants as many people as possible to be using this, so they're showing these people that it will work with their devices.
They'll save the 'superior device' angle for other features where the size of the user base is less important (GPS Navigation).