A new report claims that Apple’s upcoming iPhone 7 Plus will have an larger 256GB option, in addition to a bigger battery, further differentiating the larger 5.5” iPhone from the 4.7” iPhone 7. The report comes from Chinese site MyDrivers — the site also recently reported that a 4” iPhone will be arriving in April. It’s unclear if all the iPhone 7 Plus’ base storage capacities would increase, or if the 256GB will…