PSP specs have various configurations depending on model with some having 32 MB of RAM, others having 64 GB of RAM, some having 32 MB, 64 MB or 16 GB of user and system RAM. Different batteries, screen sizes, memory stick options, wireless options, bluetooth, etc...
And there are only 3 retail titles released playable only on the DSi. I'd hardly call that a worthy criteria for categorizing it as a seperate platform from the base DS line up.
The rEVOLution is not being televised







