iPhone (LTE)

So, all the leaks are in and the day is probably around the corner.

My quick question is this, what do people think the merits would be of releasing two near identical phones one an iPhone LTE AND the other an iPhone (sans LTE but with HSPA+, etc...)? Allows a level of price differentiation on the current model. Perhaps lets them retire the iPhone 4 and keep the iPhone 4S as the base model. Thoughts?