You put a bigger chip in so you can run it at lower power consumption levels. Essentially, there are two ways this can pan out:
* Overall utilization can remain lower, keeping it in a more power efficient band.
* Expensive actions complete faster, thus using less power (since they run for less time).
From an overall business perspective, there also doesn't really seem to be a reason to _not_ standardize the lineup on a single chip. I have to imagine is less overhead from a manufacturing standpoint and it's not like there's a particularly meaningful difference in manufacturing costs of these chips.
You put a bigger chip in so you can run it at lower power consumption levels. Essentially, there are two ways this can pan out:
* Overall utilization can remain lower, keeping it in a more power efficient band.
* Expensive actions complete faster, thus using less power (since they run for less time).
From an overall business perspective, there also doesn't really seem to be a reason to _not_ standardize the lineup on a single chip. I have to imagine is less overhead from a manufacturing standpoint and it's not like there's a particularly meaningful difference in manufacturing costs of these chips.