Yeah but it has the sidekick keyboard which is even better the G1's and kills the G2's (the mytouch slide keyboard is better than the G2's)
Oh and you are correct sir the G2x is HSPA+ compatible but it is the same version found on the G2 and MyTouch 4G. That being the 14.4 version. The Sidekick is HSPA+ 21 like the Vibrant 4G.
Just ordered mine... I am secure enough in my manhood to get the pink one. It just looks better. I will however be buying a black battery cover replacement.