Regardless of the time frame, if renders are to be believed, the handsets will look quite similar to its predecessor, with only minor differences in design. (neowin.net)
And frankly, I noticed only minor differences in the throttle mapping for each one. (cnet.com)
As you can see in the video below, both phones share the same basic design on the rear, with only minor differences between the two. (9to5google.com)